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Unit 2 Stay Healthy 语法突破及同步练习
Grammar Focus 语法突破
一、反身代词
1. 构成
单数：myself, yourself, himself/herself/itself
复数：ourselves, yourselves, themselves
2. 用法
用法 例句
作动词或介词的宾语 Take good care of yourself. 好好照顾你自己。
作主语或宾语的同位语 Mrs Black herself is a lawyer. 布莱克夫人本人就是一名律师。
作表语 Just be yourself. 做你自己就好了。
3. 常见短语
teach oneself = learn by oneself 自学
enjoy oneself 过得愉快
help oneself to… 随便吃/用……
look after oneself 照顾某人自己
dress oneself 给自己穿衣服
二、情态动词 could / should
核心规则：情态动词与动词原形连用，无人称和数的变化；否定形式在其后加 not。
1. could 的用法
用法 例句
can 的过去式（表示过去的能力） I could run very fast when I was in primary school. 我小学时能跑得很快。
礼貌地提出请求（语气委婉，用于求助） Could you help me carry these books to the classroom 你能帮我把这些书搬到教室吗？
提出建议（委婉地给出可能性） If you don't know how to solve the problem, you could ask Li Ming. 如果你不知道怎么解这道题，你可以问李明。
表推测（根据已知信息猜测可能性） Anna didn't answer her phone. She could be doing her homework. 安娜没接电话，她可能在写作业。
2. should 的用法
用法 例句
委婉地提出意见或建议（语气温和，用于给朋友/他人提建议） You should drink more water if your throat feels dry. 喉咙干的话，你应该多喝点水。
表示义务或责任（强调“应该做的事”） We should keep our classroom clean as it's our shared space. 我们应该保持教室干净，因为这是我们共同的空间。
表示命令或要求（语气较强烈） You should hand in your homework before the bell rings — no exceptions! 你应该在上课铃响前交作业，没有例外！
表示预测或可能性（根据现有信息推测结果） The weather report says it's sunny, so it should be warm enough for our picnic tomorrow. 天气预报说晴天，所以明天应该足够暖和，适合我们野餐。
同步练习
Ⅰ. 单项选择
( )1. ______ you give me a hand I can't move the box by myself.
A. Can't B. Could C. Should D. Need
( )2. —Some people don't show their talents in the very beginning.
— I agree. Even Einstein ______ read until he was seven.
A. can't B. mustn't C. needn't D. couldn't
( )3. —My maths is a little poor. Can you give me some advice, Amy
— I think you ______ listen to your maths teacher carefully in class.
A. mustn't B. should C. would D. can
( )4. To keep children away from danger during the coming summer holiday, parents ______ give them some safety tips.
A. should B. may C. could D. might
( )5. We students ______ be afraid of problems if we want to make our dreams come true.
A. should B. shouldn't C. may D. may not
( )6. Boys and girls, you should look after ______ when your parents are not at home.
A. yourselves B. herself C. himself D. ourselves
( )7. —Do you help your sister Mary wash her clothes
— No, she washes them ______.
A. myself B. himself C. herself D. yourself
( )8. I'm not good at maths, but I often say to ______, "Never give up!"
A. herself B. myself C. themselves D. yourself
( )9. Little Tom was proud of ______ because he taught Uncle Li how to borrow books online.
A. himself B. his C. he D. him
( )10. Don't ask what this country can do for you. Ask ______ what you can do for this country.
A. yourselves B. you C. themselves D. them
Ⅱ. 用括号内所给单词的适当形式填空
Jenny threw ______ (her) onto the bed as soon as she came back home.
The picture is too difficult to draw, but little Tony still finished it ______ (he).
The twins can do a lot of housework by ______ (they).
Our school life is more interesting now because we can enjoy ______ (we) in different clubs.
Should students ______ (wear) school uniforms on weekdays
参考答案
Ⅰ. 单项选择
1.B 2. D 3. B 4. A 5. B 6. A 7. C 8. B 9. A 10. A
Ⅱ. 用括号内所给单词的适当形式填空
11.herself 12. himself 13. themselves 14. ourselves 15. wear
题目解析
第1题：请求别人帮忙用委婉语气，用 could 最礼貌。
第2题：表示“过去不能”，用 couldn't。
第3题：给建议用 should。
第4题：父母“应该”给孩子安全提示，表责任义务。
第5题：“不应该害怕困难”，用 shouldn't。
第6题：主语是 Boys and girls，对应反身代词 yourselves。
第7题：主语是 she，对应反身代词 herself。
第8题：主语是 I，对应反身代词 myself。
第9题：主语是 Little Tom，对应反身代词 himself。
第10题：句意为“问问你们自己”，对应 yourselves。
第11题：throw oneself onto the bed 表示“扑倒在床上”，主语是 Jenny，用 herself。
第12题：by oneself 表示“独自”，主语是 Tony，用 himself。
第13题：by oneself 表示“独自”，主语是 The twins，用 themselves。
第14题：enjoy oneself 表示“玩得开心”，主语是 we，用 ourselves。
第15题：情态动词 should 后接动词原形，用 wear。

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