answer的过去式
七下M8语法~一般过去时（2） 来自Alice老师英语微课堂 00:00 07:20 1.概念：表示过去经常发生的动作。
Did he often walk to school last term?
2.时间标志词：three days ago, yesterday, the day before yesterday, last night (week, month, year…), in 1989, just now, at the age of 15, once upon a time，… 。
3.基本结构：主+行为动词过去式(did)
句型变化：含有行为动词的一般过去时进行句型变化时，要借助助动词did。变否定句，谓语动词后面加didn’t,后加动原；变一般疑问句，Did提前，后加主语，再加动原。具体如下：
①肯定句 主+行为动词的过去式
②否定句 主+didn’t+动原（行为动词的原形）
③一般疑问句 Did +主语+动原？
肯定回答：Yes,主+did.
否定回答：No,主+didn’t.
【举例】把下面这句话变成否定句，一般疑问句并做肯否定回答。
He moved to America last year.
He didn’t move to America last year.
—Did he move to America last year?
—Yes, he did./No, he didn’t.
4.动词过去式（-ed）变化规则：
| 一般在动词后+ed | answer-answered, help-helped, play-played |
| 以不发音的字母e结尾+d | move-moved, use-used, notice-noticed |
| 以辅音字母+y结尾，变y为i再加ed | carry-carried, reply-replied, study-studied, hurry-hurried |
| 重读闭音节以元音字母加一个辅音字母结尾,双写这个辅音字母，再加ed | stop-stopped, plan-planned, drop-dropped |
【拓展】
-ed在动词末尾的发音规律：清清浊浊元后浊，/t//d/后面/?d/妥
①在清辅音后，-ed读/t/
noticed [?n??t?st]; jumped[d??mpt]
②在浊辅音和元音后，-ed读/d/
entered[?ent?d]; cleaned[kli?nd]
③在t和d后，-ed读/?d/
wanted[?w?nt?d]; needed[?ni?d?d]
巩固练习
-When ___you ____ here?- Two days ago. (天津市2015)
A. did; come
B. have; come
C. will;come
D. do; come
2. I have been to Shanghai.I ____________ there last month. (天津市2012)
A. go
B.went
C. have gone
D. will go
3. —Jerry,have you ever been to the Great Wall?
—Yes. I ______ there with my parents last year. [天津市2018]
A. go
B. went
C. will go
D. have gone
4. The boy ________ stay at home. He went to a movie.
A．didn’t
B．don’t
C．wasn’t
D．isn’t
5. ________ they ________ tennis after school yesterday?
A．Do；play
B．Did；play
C．Do；played
D．Did；played
(不提供答案，有问题留言给Alice老师)
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