could的用法及练习含答案
could 是情态动词，它是can的过去式，用法同can，表示过去的状态。注意:无论是can还是could，后面均接动词原形。
1.陈述句:使用方法同cancould 放在主语之后。句型结构:主语+如:
Five years ago, I could read and write.
五年前，我会阅读和写字。
Six years ago, I could ride a bike.
六年前，我会骑车。
2.否定:含有could的句子为定时，使用方法同can，只要在could 后加 not 即可。否定形式:cannot=can"t,could not=couldn"t句型结构: 主语+couldn't…. 如:
Five years ago, I couldn't read or write.
五年前，我不会阅读和写字。
Six years ago, I couldn't ride a bike.
六年前，我不会骑车。
3.一般疑问句:使用方法同can，将could提至句首。句型结构:
Could+主语..?肯定回答:Yes,主语+could.
否定回答:No，
主语+couldn't.如:
Could you write emails twelve years ago? 十二年前你会写吗?
Could Jack make a toy car two years ago? 杰克两年前会做玩具汽车吗?
4.could 引导的特殊问句:特殊疑问词 +could 引导的一般问句?如:
They could ride a bike last year. (对划线部分提问)
What could they do last year? 去年他们会干什么?
练习
按要求改写句子
1.Mike could read and draw six years ago.
① 改为否定句:
②改为一般疑问句:
can的过去式肯定回答:
否定回答:
③对read and draw提问:
2.Mr. Black could sing English songs twenty years ago
① 改为否定句:
②改为一般疑问句:
肯定回答:
否定回答:
③ 对 sing English songs 提问:
④对twenty years ago 提问:
3.Lily could draw pictures ten years ago.
① 改为否定句:
② 改为一般疑问句:
肯定回答:
否定回答:
③对 draw pictures 提问:
④对Lily提问:-
could的用法及练习答案
按要求改写句子。
1.Mike couldn't read or draw six years ago
Could Mike read or draw six years ago?
Yes,he could./No,he couldn't.
What could Mike do six years ago?
2.Mr Black couldn't sing English songs twenty yearsago.
Could Mr Black sing English songs twenty years ago?
Yes,he could./No,he couldn't.
What could Mr Black do twenty years ago?
When could Mr Black sing English songs?
3.Lily couldn't draw pictures ten years ago
Could Lily draw pictures ten years ago?
Yes,she could./No,she couldn't.
What could Lily do ten years ago?
Who could draw pictures ten years ago?
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