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人教版八年级下册Unit 6单元语法知识梳理与练习
一：单元语法知识梳理 (Unit 6 Crossing Cultures)
一、so ... that 引导的结果状语从句 (Adverbial clauses of result)
【规则变化】 so ... that 意为“如此……以至于……”，用来引导结果状语从句。其基本结构为：
主语 + 谓语 + so + 形容词/副词 + that + 结果状语从句。
【注意】 当 that 从句是否定句时，so...that... 结构有时可以与 too...to... (太……而不能……) 或 not ... enough to... (不够……而不能……) 进行同义句转换。
【拓展】 如果修饰的是名词，则需要用 such ... that... 结构。例如：It was such a beautiful day that we all went for a picnic.
【例句】 I was so hungry that I ate a big bowl of noodles and a big plate of dumplings. 我饿极了，以至于吃了一大碗面条和一大盘饺子。
The boy ran so fast that I couldn't catch him. 这个男孩跑得如此快，以至于我追不上他。
二、unless 引导的条件状语从句 (Adverbial clauses of condition)
【规则变化】 unless 意为“除非；如果不”，用来引导条件状语从句，含有否定的意义。它在用法上相当于 if ... not。
【注意】 和 if 引导的条件状语从句一样，unless 引导的从句也要遵循“主将从现”的原则，即：如果主句是一般将来时、祈使句或含有情态动词，从句必须用一般现在时来表将来。
【易错点】 由于 unless 本身就含有否定意义，因此在其引导的从句中，通常不再使用否定词（如 not, never 等），否则会造成双重否定。
【例句】 Nothing is impossible unless you think it is. 没有什么是做不到的，除非你认为它不可能。
You will fail the exam unless you study hard. (= if you don't study hard) 除非你努力学习，否则你考试会不及格的。
三、as soon as 引导的时间状语从句 (Adverbial clauses of time)
【规则变化】 as soon as 意为“一……就……”，用来引导时间状语从句，强调主句动作紧接着从句动作发生，两个动作几乎同时进行。
【注意】 与 unless 类似，as soon as 引导的时间状语从句在表示将来的动作时，也必须遵循“主将从现”的原则（主句一般将来时，从句一般现在时）。
如果描述的是过去发生的事情，主句和从句则通常都使用一般过去时。
【例句】 In Japan, we bow as soon as we meet a teacher. 在日本，我们一见到老师就会鞠躬。
Please give me a call as soon as you arrive in Beijing. 你一到北京请给我打个电话。
I recognized her as soon as I saw her. 我一看到她就认出了她。 (过去时态)
二：单元语法知识练习
I. 单项选择（10道）
1. Please give me a call ________ you arrive in Beijing.
A. so that
B. as soon as
C. unless
D. although
2. The weather was ________ bad yesterday that we had to stay at home.
A. so
B. such
C. too
D. very
3. Nothing is impossible ________ you think it is.
A. if
B. because
C. until
D. unless
4. —Shall we go for a picnic tomorrow
—Well, we won't go ________ it rains.
A. if
B. unless
C. as soon as
D. so that
5. The physics problem is ________ difficult ________ nobody in our class can work it out.
A. too; to
B. such; that
C. so; that
D. enough; to
6. In Japan, students usually bow ________ they meet a teacher.
A. before
B. unless
C. as soon as
D. so that
7. You will not pass the English exam ________ you work hard.
A. if
B. unless
C. when
D. while
8. Mary was ________ excited that she couldn't fall asleep last night.
A. very
B. so
C. such
D. too
9. I will tell him the good news as soon as he ________ back.
A. come
B. came
C. comes
D. will come
10. He didn't know the local customs, ________ he made some mistakes at the dinner party.
A. so
B. unless
C. but
D. because
II. 语法填空（3篇）
Passage 1
"When in Rome, do as the Romans do." It is very important 11. ________ (know) different customs when you go to a foreign country. For example, in Japan, people bow to each other 12. ________ soon as they meet. It is a very polite way to greet others. In the US, people usually 13. ________ (shake) hands. However, some customs can be quite 14. ________ (confuse). 15. ________ you learn about them before you travel, you might make mistakes. Last year, I went to France. The food was 16. ________ delicious that I ate too much every day! I loved the country so much that I decided to go there again as soon as I 17. ________ (save) enough money. I think understanding different cultures makes travelling much 18. ________ (easy) and 19. ________ (fun). We should respect all cultures 20. ________ that we can communicate with people from all over the world smoothly.
Passage 2
Last week, my foreign friend Jack invited me to his house for dinner. I was so 21. ________ (excite) that I accepted the invitation immediately. I bought some beautiful flowers as a gift as soon as I 22. ________ (leave) school. When I arrived, Jack's mother greeted me 23. ________ (warm). During the dinner, I tried to use a knife and fork. But it was 24. ________ difficult that I accidentally dropped a piece of meat on the table. I felt very 25. ________ (embarrass). Jack smiled and said, "Don't worry 26. ________ you make mistakes. We can use chopsticks if you like." I replied, "27. ________ I try using them, I will never learn how to do it properly." Finally, I successfully 28. ________ (eat) my meal with the knife and fork. It was such a 29. ________ (wonder) evening. I will invite him to my house to have Chinese food as soon as my mother 30. ________ (come) back from her business trip.
Passage 3
Learning a foreign language is not easy 31. ________ you practice it every day. I started learning English when I 32. ________ (be) ten years old. At first, the grammar was so hard 33. ________ I almost wanted to give up. But my English teacher told me to read more English books and learn about the cultures behind the language. As soon as I 34. ________ (finish) reading my first English storybook, I found it very fascinating. Now, I watch English movies often 35. ________ that I can improve my listening skills. I won't stop learning English 36. ________ I can speak it fluently like a native speaker. In the future, I plan to visit the UK as soon as I 37. ________ (graduate) from high school. I am sure I will have a great 38. ________ (experience) there. 39. ________ we open our eyes to the world and accept cultural differences, we can't truly understand our own 40. ________ (culture). Let's keep exploring!人教版八年级下册Unit 6单元语法知识梳理与练习
一：单元语法知识梳理 (Unit 6 Crossing Cultures)
一、so ... that 引导的结果状语从句 (Adverbial clauses of result)
【规则变化】 so ... that 意为“如此……以至于……”，用来引导结果状语从句。其基本结构为：
主语 + 谓语 + so + 形容词/副词 + that + 结果状语从句。
【注意】 当 that 从句是否定句时，so...that... 结构有时可以与 too...to... (太……而不能……) 或 not ... enough to... (不够……而不能……) 进行同义句转换。
【拓展】 如果修饰的是名词，则需要用 such ... that... 结构。例如：It was such a beautiful day that we all went for a picnic.
【例句】 I was so hungry that I ate a big bowl of noodles and a big plate of dumplings. 我饿极了，以至于吃了一大碗面条和一大盘饺子。
The boy ran so fast that I couldn't catch him. 这个男孩跑得如此快，以至于我追不上他。
二、unless 引导的条件状语从句 (Adverbial clauses of condition)
【规则变化】 unless 意为“除非；如果不”，用来引导条件状语从句，含有否定的意义。它在用法上相当于 if ... not。
【注意】 和 if 引导的条件状语从句一样，unless 引导的从句也要遵循“主将从现”的原则，即：如果主句是一般将来时、祈使句或含有情态动词，从句必须用一般现在时来表将来。
【易错点】 由于 unless 本身就含有否定意义，因此在其引导的从句中，通常不再使用否定词（如 not, never 等），否则会造成双重否定。
【例句】 Nothing is impossible unless you think it is. 没有什么是做不到的，除非你认为它不可能。
You will fail the exam unless you study hard. (= if you don't study hard) 除非你努力学习，否则你考试会不及格的。
三、as soon as 引导的时间状语从句 (Adverbial clauses of time)
【规则变化】 as soon as 意为“一……就……”，用来引导时间状语从句，强调主句动作紧接着从句动作发生，两个动作几乎同时进行。
【注意】 与 unless 类似，as soon as 引导的时间状语从句在表示将来的动作时，也必须遵循“主将从现”的原则（主句一般将来时，从句一般现在时）。
如果描述的是过去发生的事情，主句和从句则通常都使用一般过去时。
【例句】 In Japan, we bow as soon as we meet a teacher. 在日本，我们一见到老师就会鞠躬。
Please give me a call as soon as you arrive in Beijing. 你一到北京请给我打个电话。
I recognized her as soon as I saw her. 我一看到她就认出了她。 (过去时态)
二：单元语法知识练习
I. 单项选择（10道）
1. Please give me a call ________ you arrive in Beijing.
A. so that
B. as soon as
C. unless
D. although
2. The weather was ________ bad yesterday that we had to stay at home.
A. so
B. such
C. too
D. very
3. Nothing is impossible ________ you think it is.
A. if
B. because
C. until
D. unless
4. —Shall we go for a picnic tomorrow
—Well, we won't go ________ it rains.
A. if
B. unless
C. as soon as
D. so that
5. The physics problem is ________ difficult ________ nobody in our class can work it out.
A. too; to
B. such; that
C. so; that
D. enough; to
6. In Japan, students usually bow ________ they meet a teacher.
A. before
B. unless
C. as soon as
D. so that
7. You will not pass the English exam ________ you work hard.
A. if
B. unless
C. when
D. while
8. Mary was ________ excited that she couldn't fall asleep last night.
A. very
B. so
C. such
D. too
9. I will tell him the good news as soon as he ________ back.
A. come
B. came
C. comes
D. will come
10. He didn't know the local customs, ________ he made some mistakes at the dinner party.
A. so
B. unless
C. but
D. because
II. 语法填空（3篇）
Passage 1
"When in Rome, do as the Romans do." It is very important 11. ________ (know) different customs when you go to a foreign country. For example, in Japan, people bow to each other 12. ________ soon as they meet. It is a very polite way to greet others. In the US, people usually 13. ________ (shake) hands. However, some customs can be quite 14. ________ (confuse). 15. ________ you learn about them before you travel, you might make mistakes. Last year, I went to France. The food was 16. ________ delicious that I ate too much every day! I loved the country so much that I decided to go there again as soon as I 17. ________ (save) enough money. I think understanding different cultures makes travelling much 18. ________ (easy) and 19. ________ (fun). We should respect all cultures 20. ________ that we can communicate with people from all over the world smoothly.
Passage 2
Last week, my foreign friend Jack invited me to his house for dinner. I was so 21. ________ (excite) that I accepted the invitation immediately. I bought some beautiful flowers as a gift as soon as I 22. ________ (leave) school. When I arrived, Jack's mother greeted me 23. ________ (warm). During the dinner, I tried to use a knife and fork. But it was 24. ________ difficult that I accidentally dropped a piece of meat on the table. I felt very 25. ________ (embarrass). Jack smiled and said, "Don't worry 26. ________ you make mistakes. We can use chopsticks if you like." I replied, "27. ________ I try using them, I will never learn how to do it properly." Finally, I successfully 28. ________ (eat) my meal with the knife and fork. It was such a 29. ________ (wonder) evening. I will invite him to my house to have Chinese food as soon as my mother 30. ________ (come) back from her business trip.
Passage 3
Learning a foreign language is not easy 31. ________ you practice it every day. I started learning English when I 32. ________ (be) ten years old. At first, the grammar was so hard 33. ________ I almost wanted to give up. But my English teacher told me to read more English books and learn about the cultures behind the language. As soon as I 34. ________ (finish) reading my first English storybook, I found it very fascinating. Now, I watch English movies often 35. ________ that I can improve my listening skills. I won't stop learning English 36. ________ I can speak it fluently like a native speaker. In the future, I plan to visit the UK as soon as I 37. ________ (graduate) from high school. I am sure I will have a great 38. ________ (experience) there. 39. ________ we open our eyes to the world and accept cultural differences, we can't truly understand our own 40. ________ (culture). Let's keep exploring!
【参考答案与解析】
I. 单项选择
1.【答案】B
【解析】句意：你一到北京请给我打个电话。考查连词辨析。so that 以便；as soon as 一……就……；unless 除非；although 尽管。根据语境，表示动作的紧密相连，故选B。
2.【答案】A
【解析】句意：昨天天气太糟糕了，以至于我们不得不待在家里。考查固定句型。so + adj./adv. + that... 表示“如此……以至于……”。bad 是形容词，前面用 so 修饰。故选A。
3.【答案】D
【解析】句意：没有什么是做不到的，除非你认为它不可能。考查条件状语从句。if 如果；because 因为；until 直到；unless 除非。句意符合逻辑的是“除非”，故选D。
4.【答案】A
【解析】句意：——我们明天去野餐好吗？——嗯，如果下雨我们就不去了。考查连词辨析。根据逻辑，如果不下雨才去，即“如果”下雨我们就不去，用 if。如果用 unless，意思成了“除非下雨我们才不去了（意味着不下雨我们也不去）”，逻辑不通。故选A。
5.【答案】C
【解析】句意：这道物理题如此难，以至于我们班没人能解出来。考查结果状语从句。so + 形容词 (difficult) + that + 从句，表示“如此……以至于……”。故选C。
6.【答案】C
【解析】句意：在日本，学生们一见到老师通常就会鞠躬。考查时间状语从句连词。before 在……之前；unless 除非；as soon as 一……就……；so that 以便。见面立即鞠躬，用 as soon as。故选C。
7.【答案】B
【解析】句意：除非你努力学习，否则你不会通过英语考试的。考查条件状语从句。相当于 If you don't work hard, you will not pass... ，此处用 unless 替换 if not。故选B。
8.【答案】B
【解析】句意：玛丽如此兴奋，以至于昨晚睡不着觉。考查固定搭配。so + adj. + that从句。excited 为形容词，用 so 修饰。故选B。
9.【答案】C
【解析】句意：他一回来我就会把这个好消息告诉他。考查“主将从现”。as soon as 引导的时间状语从句，主句用一般将来时 (will tell)，从句用一般现在时表将来。主语 he 是第三人称单数，故填 comes。故选C。
10.【答案】A
【解析】句意：他不懂当地的习俗，因此在晚宴上犯了一些错误。考查并列连词。前后分句构成因果关系，前面是原因，后面是结果，用 so。故选A。
II. 语法填空
Passage 1 答案及解析：
11. to know。It is adj. to do sth. 为固定句型，不定式作真正的主语。
12. as。as soon as 固定搭配，意为“一……就……”。
13. shake。一般现在时，主语 people 为复数，谓语动词用原形。
14. confusing。修饰事物 (customs) 令人困惑的，用 -ing 结尾的形容词 confusing。
15. Unless。根据句意“除非你在旅行前了解它们，否则可能会犯错”，填 Unless，句首首字母大写。
16. so。与后面的 that 呼应，构成 so...that (如此……以至于)。
17. save。as soon as 引导时间状语从句，主句用一般将来时，从句用一般现在时表将来，主语是 I，用原形 save。
18. easier。much 修饰比较级，easy 的比较级是 easier。
19. funnier / more fun。与 easier 并列用比较级。fun 既可作名词也可作形容词（口语中比较级常用 more fun），或者填 funnier（滑稽的，有趣的）。此处更推荐填 more fun 或 funnier。
20. so。so that 引导目的状语从句，意为“以便；为了”。
Passage 2 答案及解析：
21. excited。修饰人感到兴奋的，用 -ed 结尾的形容词 excited。
22. left。as soon as 引导时间状语从句，描述过去的事情，主从句均用一般过去时。leave 的过去式是 left。
23. warmly。修饰动词 greeted 需用副词 warmly (热情地)。
24. so。so...that 结构，如此困难以至于……
25. embarrassed。feel 为系动词，修饰人感到尴尬用 -ed 结尾的形容词 embarrassed。
26. if / when。根据句意“如果你犯了错不要担心”填 if 或 when 均可。
27. Unless。根据句意“除非我尝试去用，否则永远学不会”，填 Unless，首字母大写。
28. ate。讲述过去的事情，用一般过去时。eat 过去式为 ate。
29. wonderful。such a + adj + n 结构，修饰 evening 用形容词 wonderful。
es。as soon as 引导时间状语从句，主将从现。主语 my mother 是单三，用 comes。
Passage 3 答案及解析：
31. unless。根据句意“除非你每天练习，否则学习外语不容易”，填 unless。
32. was。讲述过去的事，主语 I 搭配 be 动词的过去式 was。
33. that。so...that 结构，如此难“以至于”我想放弃。
34. finished。as soon as 引导过去的时间状语从句，用一般过去时 finished。
35. so。so that 引导目的状语从句，以便能提高听力。
36. until。not ... until 句型，直到能流利地说才停止学习。
37. graduate。as soon as 引导时间状语从句，主将从现，I 搭配动词原形 graduate。
38. experience。前面有 a great 修饰，填可数名词单数 experience（经历）。
39. Unless。根据后半句的否定“我们就不能真正理解”，前面表示“除非我们睁眼看世界”，用 Unless，首字母大写。
40. culture。修饰词 own 后面跟名词 culture（文化）。

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