内容正文:
Unit 1 & 2- Grammar
一般过去时 VS 现在完成时・used to
一般过去时Vs现在完成时
Point
时态(tense),是动词的一种形式,用以说明动作发生的时间与状态。
英语这两种时态都可以描述过去发生的动作,但是侧重点完全不同:
1.一般过去时 (the simple past tense):强调动作发生在过去某个确定时间点,动作和现在没有联系。
2.现在完成时 (the present perfect tense):强调过去动作对现在造成的结果 / 影响,不强调动作具体发生时间。
Mike bought the dictionary yesterday.
(强调动作发生的特定时间:yesterday)
一般过去时
Mike has bought the dictionary.
(强调对现在的影响:他现在有这本词典)
现在完成时
思考: 动作是否对现在有影响
思考: 3. 谓语动词变化
一般过去时
现在完成时
Mike has bought the dictionary.
Mike bought the dictionary yesterday.
Past
Present
result
注意:被动语态里的谓语动词一定是及物动词。
Past
complete
Present
时间标志词
Point
一般过去时 现在完成时
last + day/month/week/year… for + 一段时间
…days/weeks/months/years ago since + 时间点
yesterday 昨天 already 已经
the day before yesterday 前天 never 从不
In + 过去年份(如 in 2020) ever 曾经
at that time 在那时 yet 还,已经(否定 / 疑问)
already 还,已经(肯定)
just now 刚才 just 刚刚
现在完成时句式结构
Point
现在完成时:
① 肯定句:主语 + have /has + 动词过去分词 + 其他
He has visited his grandma.
②否定句:主语 + have /has + not (haven’t/hasn’t) + 动词过去分词 + 其他
He hasn’t visited his grandma.
③ 一般疑问句:Have / Has + 主语 + 动词过去分词 + 其他?
Has he visited his grandma?
(核心要点:have/has + done(过去分词),第三人称单数用 has)
一般过去时句式结构
Point
一般过去时:
① 肯定句:主语 + 动词过去式 + 其他
He visited his grandma last week.
② 否定句:主语 + did not (didn’t) + 动词原形 + 其他
He didn’t visit his grandma last week.
③ 一般疑问句:Did + 主语 + 动词原形 + 其他?
Did he visit his grandma last week?
(核心要点:动词统一用过去式,借助 did 构成疑问、否定)
一般过去时--动词变化规则
Point
1.一般情况:直接加 -ed
work → worked play → played look → looked
2.以不发音 e 结尾:直接加 -d
live → lived like → liked change → changed
3.辅音字母 + y 结尾:变 y 为 i 加 -ed
study → studied try → tried carry → carried
4.重读闭音节(辅+元+辅):双写末尾字母加 -ed
stop → stopped drop → dropped plan → planned
5.不规则变化
go → went / buy → bought / see → saw / have → had
现在完成时--动词变化规则
Point
1.一般情况:直接加 -ed
work → worked play → played look → looked
2.以不发音 e 结尾:直接加 -d
live → lived like → liked change → changed
3.辅音字母 + y 结尾:变 y 为 i 加 -ed
study → studied try → tried carry → carried
4.重读闭音节(辅+元+辅):双写末尾字母加 -ed
stop → stopped drop → dropped plan → planned
现在完成时--动词变化规则
Point
5.不规则变化
go(去)→ went【过去式】→gone【过去分词】
see(看见)→ saw【过去式】→ seen【过去分词】
buy(买)→ bought【过去式】→ bought【过去分词】
take(拿)→ took【过去式】→ taken【过去分词】
do(做)→ did【过去式】→ done【过去分词】
核心总结
1. 规则动词:过去式 = 过去分词(形式一样)
2. 不规则动词:重点区分!过去式用于一般过去时,过去分词用于现在完成时
谓语动词_______
句子结构:have/has+过去分词
谓语动词_______
说明_____________ 的关系
一般过去时:可以带具体过去时间,描述过去发生的动作,和现在没有联系;时间词也可以省略,靠语境判断。常搭配 yesterday, last week, …ago
现在完成时:不能搭配具体过去时间,强调过去动作带来的**现在的结果 / 影响。常搭配:already, yet, since, for
注意: 助动词 be有___________________的变化
动作发生时间与现在的关联
时态
现在完成时
一般过去时
动词过去分词
动词过去式
人称、数和时态
10
1. —How long ____ you ____ your hobby of programming?
—For three years.
A. do; keep B. did; keep C. have; kept D. will; keep
2. I ____ this book for two weeks. I must return it to the library.
A. have borrowed B. have kept C. borrowed D. keep
3. My father ____ the Party since 1998.
A. joined B. has joined C. has been in D. was in
4. —____ you ____ your homework yet?
—Yes, I ____ it just now.
A. Did; finish; finished B. Have; finished; finished
C. Have; finished; have finished D. Did; finish; have finished
C
B
C
B
5. —Have you visited Russia, Lilian?
—Yes, I ____ there for two weeks.
A. studied B. was studying C. have studied D. studies
6. —Have you ever been to Beijing?
—Yes, I ____ there last month.
A. have been B. have gone C. went
7. Grandparents ____ to America before.
A. went B. has been C. have gone D. have been
8. —____ you ____ the film before, Lily?
—Yes. I ____ it online the other day.
A. Have; seen; have seen B. Did; see; saw
C. Have; seen; saw D. Did; see; have seen
A
C
D
C
9. Since we ____ the volunteer programme last month, we ____ more than 200 volunteers.
A. have started; had B. started; have
C. have started; have D. started; have had
10. —When did Uncle John ____ Aunt Alice?
—At the end of the year 2014. They ____ for over ten years.
A. marry with; have married B. marry with; got married
C. marry; have been married D. marry; married
11. —I haven’t seen you for two years!
—Oh, I ____ as a teacher at Sunshine Middle School for four years, and now I become a writer.
A. have been working B. worked
C. have worked D. have been in
D
C
B
used to 相关用法
Point
肯定句 主语 + used to + 动词原形 There used to be a small park here.
there used to be 过去曾经有
否定句 主语 + didn’t use to + 动词原形
主语 + usedn’t to + 动词原形 She didn’t use to like reading.
= She usedn’t to like reading.
一般疑问句 Did + 主语 + use to + 动词原形?
Yes, 主语 + did. / No, 主语 + didn’t. Did you use to play basketball?
—Yes, I did. / No, I didn’t.
特殊疑问句 特殊疑问词 + did + 主语 + use to + 动词原形? What did he use to do on weekends?
used to do sth:过去常常做某事;过去曾经存在某种状态,暗含今昔对比,现在情况已经发生改变。
used to三大易混短语对比
Point
used to do sth. 过去常常做某事
(现在不做了) I used to swim.
be used to doing sth. 习惯于做某事
(to 是介词,后面 + doing) I am used to swimming.
be used to do sth. = be used for doing 被用来做某事(被动语态) Knives are used to cut things.
1. Don’t waste the water. It can be used ______ (wash) the floor.
2. There used to ______ (be) a school in this area, but now it becomes a big shopping mall.
3. Gina used to ______ in the countryside with her parents,but now she is used to ______ with her classmates at school. (live)
4. He ______ (use) to look at the stars every night, but now he does not.
5. This knife can be used ______ (cut ) things.
6. She used to ______ in the morning, but now she is used to ______ at night.(read)
to wash
be
live
living
used
to cut
read
reading
7. My grandma ______ newspapers after breakfast, but now she can’t see very clearly. (read)
8. She is used to ______ (wear) T-shirts and jeans.
1. Grace used to watch much TV. (否定句)
Grace ______ ______ to watch much TV.
2. Linda used to be a dancer. (改为一般疑问句)
______ Linda ______ to be a dancer?
3. My grandmother used to live a hard life. (改为反意疑问句)
My grandmother used to live a hard life, ______ ______?
used to read
wearing
didn’t use
Did
use
didn’t she
4. I used to go to school by bike. (对画线部分提问)
______ ______ you use to go to school?
5. Bruce often went to bed late when he was a little boy. (保持句子意思不变)
Bruce ______ ______ go to bed late when he was a little boy.
1. We used to ______ in the evening, but now we are used to ______ early in the morning.
A. exercise; exercise B. exercise; exercising
C. exercised; exercise D. exercising; exercise
How did
used to
B
2. Mike ___ go out with parents, but now he ___ at home alone.
A.used to; is used to staying B. used to; used to stay
C. is used to; used to stay D.is used to; is used to stay
3. He used to __tennis, but now he never plays sports.
A. play B. plays C. playing D. played
4. Ann ___ only listen in class, but now she ___ taking notes when teachers say something important.
A.used to; used to B.gets used to; gets used to
C.used to; gets used to D. gets used to; used to
5. He ___smoke, but he gave it up a couple of years.
A. is used to B.is used to C.used to D.was used to
A
A
C
C
6. Wood and stones __ bridges in many countries.
A.used to build B.are used to building
C. are used to build D. used to building
7. New technology ___to stop the students from cheating in the exam last year.
A. is used B. used C.was used D.were used
8. Mother___us stories when we were young.
A.used to telling B. is used to tell
C.used to tell D. is used to telling
C
C
C
Thanks !
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