资源简介

Unit 4 Grammar（时间介词&频度副词）
Grammar A---表示时间的介词(in/on/at)
时间状语往往由介词短语充当，不同的时间所使用的介词也不相同，我们常用in、on或at来表示时间。
at
1.某一时刻 at 4:15 at six o’clock
2.在一日三餐前 at breakfast
3.在无day的节日前 at Christmas
4.在具体年龄前 at 12 (years old)/at 8 years old
on
1.在星期 名称前 on Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday
2.在某月某日前 on 1 September
3.某一天的上午、下午、晚上 on a cold morning/Sunday afternoon
4.特定的节日(一天) on Children's Day/ on May Day
in
1.在一天早中晚前 in the morning/afternoon/evening
2.在月份前 in January/February/March/April/May/June/July/August/September/October/
November/December
3.在年份前 in 2008/2022/2100
4.在季节前 in spring/summer/autumn/winter
注意：
如果节日不止一天,而是持续一段时间,我们用at,如: at Christmas/at the Spring Festival。
在没有day节日前用 at。如：
1. Christmas 圣诞节2. Spring Festival 春节 3. Dragon Boat Festival龙舟节
4. Mid-autumn Festival 中秋节 5. Halloween 万圣节前夜
在有day节日前用 on。如：
1.New Year’s Day元旦节 2.Children’s Day儿童节 3.May Day五一节
4.Mother’s Day母亲节 5.Father’s Day父亲节 6.Teachers’ Day教师节
7.Thanksgiving Day 感恩节
Grammar B---频度副词
always, usually, often, sometimes, seldom, never等词被称为频度副词，可与一般现在时连用，表示做某件事的频率。如:
He always takes a walk after dinner.他总是晚饭后去散步。
They are never late for school.他们上学从不迟到。
Many Chinese people often pay with mobile phones now.现在很多中国人经常用手机进行支付。
注意:
1.频度副词所表示的频率由高到低为:
always (总是)usually(通常)often (经常)sometimes(有时)seldom(很少)never(从不)
2.频度副词一般放在行为动词的前面、助动词do/does和动词be的后面。如：
It is usually hot in summer. 夏天天气通常是热的。
My father usually walks home.我的父亲经常步行回家。
We do not often go to the cinema.我们不经常去看电影。
拓展：
1). never 反义词 always ; often 反义词 seldom
2). never和seldom表示否定; sometimes/often/usually/always表示肯定。
3).频度副词还有：
every+段时间 (day/week/month---etc) //次数+段时间：once/twice/three times a year---etc
4).sometimes=at times=from time to time
5).sometimes/some times/sometime/some time的区别：
sometimes有时some times 一些次sometime 某个时候 some time 一段时间
6).how often是对表示频度副词的时间状语的提问，可翻译为“多久(一次)”。如：
---How often are you late for school ---Never.
---How often does Eddie walk to his bowl ---Many times a day.
---How often does Amy go swimming ---Every week.
★频率副词的注意要点:
1.在简答句中，频率副词必须放在 be 动词或助动词的「前面」。如：
---Are you usually busy at home ---Yes, I usually am.
---Do they often ride a bicycle to school ---Yes, they often do.
2.sometimes 通常放在一般动词的「前面」，但也可放在「句尾」。如果要加强语气，则放在「句首」。如：
She sometimes goes by car. →一般位置
= She goes by car sometimes. →在句尾
= Sometimes she goes by car. →表示加强语气
3.often 如果被 very 或 quite 修饰时，则放在「句尾」。
He often calls me. →一般位置He calls me very often. →在句尾
4.频率副词usually与sometimes 的特殊位置如下：
1). sometimes + 否定 ( not ): He sometimes doesn’t work on Monday.
2). usually +否定 ( 或否定 + usually ) :
It doesn’t usually rain in November. = It usually doesn’t rain in November.
5.频率副词ever与never的用法区別如下：
1). ever ─ 用于「疑问句」。 2). never ─ 用与「否定回答」，句首有 No， 但不可和 not 连用。如：Do you ever play soccer →ever用于疑问句。
No, I never play soccer. →否定回答。
No, never. →否定简答句。
6.否定词never和seldom可以放在「句首」形成「倒装句」，用于加强句子的语气。如：
She is never late to school. → 一般句子 = Never is she late to school. → 倒装句
She seldom watches TV. → 一般句子 = Seldom does she watch TV. →倒装句
7.seldom因具有否定的意味，故不可和「not」连用。如：
He is seldom sick. ----------- ( T ) // He is not seldom sick. ------- ( F )
8.never有时候可放在「助动词」前面，表示加强语气。
He can never use a computer. →一般句子He never can use a computer. →加强语气
9.always如果放在「句首」，是肯定祈使句，后面要接「原形动词」如：
Always be a good boy, Tom. → always 在句首； be 是原形动词
never 如果放在「句首」，是否定祈使句，后面要接「原形动词」
Never be late to school, Tom. →never 在句首； be 是原形动词
10.频率副词+ also 如：He sometimes also takes a trip by plane.
即时自测：
一、用适当的时间介词填空。
1.---What time do you get up _____the morning _____ weekdays, Simon
2.School starts ______ 8:00 ______ the morning.
3.We have Biology classes _____ Tuesdays and Thursdays.
4.We have a field trip ______ autumn.
5.Our new term starts ________September.
6.We have lots of fun ________Children's Day.
7.Fanxian learned to write the article ________ 8 years old.
8.We took a trip to a farm ________ 2022.
9.They play the game _____________ the evening of 31st October.
10.Hey, Alice! Is your birthday ____________ 9 August
二、按要求完成下列句子。
1.We sometimes dance for half an hour.（改为同义句）
We dance for half an hour_______ ______ _______ _______.
We dance for half an hour_______ ______.
2.I don’t often have a glass of milk for breakfast. （改为同义句）
I _____________ have a glass of milk for breakfast.
3.Amy is never late for school.（划线部分提问）
______ ______ _______ Amy late for school
4.He seldom takes a taxi to go to school.(划线部分提问)
_______ _______ _______he _______ a taxi to go to school
5.They don’t have lessons every Saturday.(划线部分提问)
________ __________ __________ they ___________ lessons
6.Daniel wants to visit his grandparents once a week. (划线部分提问)
_______ _________ _________ Daniel ___________ to visit his grandparents
单项选择:
7. Tom _____ to work by bicycle.
A. usually go B. go usually C. usually goes D. goes usually
8. We often eat dinner at home on weekends, but ______ we eat out.
A. sometimes B. seldom C. never D. always
9. Jerry _____________ for school.
A. is often late B. often is late C. is late often D. goes often late
10. I don’t like skiing at all. I __ go skiing.
A. never B. always C. often D. sometimes
答案：
一、用适当的时间介词填空。
1.in,on;2.at,in;3.on;4.in;5.in; 6.on; 7.at; 8. in; 9.on; 10.on
二、按要求完成下列句子。
1.from time to time;//at times; 2.seldom; 3.How often is; 4. How often does take;
5. How often don’t have; 6. How often does want 7-10: CAAA

展开更多......

收起↑