内容正文:
语法提优 情态动词用法
知识精讲
一、情态动词could的用法
could是can的过去式,表示“能;会”,后面接动词原形。could的各种句式如下:
1.肯定句:主语+could+动词原形+其他.如:
I could draw pictures three years ago.
我三年前会画画。
2.否定句:主语+couldn't+动词原形+其他.如:
She couldn't ride a bike before.
她以前不会骑自行车。
3.一般疑问句:Could+主语+动词原形十其他?
肯定回答:Yes,主语+could.
否定回答:No,主语+couldn't.如:
—Could you play the piano five years ago?你五年前会弹钢琴吗?
—Yes,I could.是的,我会。/No,I couldn't.不,我不会。
4.特殊疑问句:特殊疑问词+could/couldn't+主语+动词原形+其他?如:
What could you do before?你以前会做什么?
Why couldn't you play football two years ago?两年前你为什么不能踢足球?
二、其他情态动词的用法
will(would)和shall(should)的用法
will(would)表示决心、愿望,would是will的过去式。will和would用于疑问句中,表示说话人向对方提出请求或询问,但would的语气比will更委婉、客气。
例:I will never do that again.我再也不会做那样的事了。
Would you like some coffee?你想要一些咖啡吗?
shall表示命令、警告、允诺、征求、劝告、建议、惊奇等;should的意思是“应该,应当”。例:Shall we go to the zoo this Sunday?这个星期日我们去动物园,好吗?
(根据学生情况适当补充其他情态动词的用法)
真题链接
一、选择题
( )1.(2023上·江苏常州·六年级校考期中)-______ your mother use the computer?
-Yes, but she ______ 10 years ago.
A.Could; couldn’t B.Can; can’t C.Can; couldn’t
( )2.(2023下·江苏连云港·六年级统考期中)You _________ run fast. But you _________ run fast on the road.
A.must; can’t B.can; must C.can; mustn’t
( )3.(2023下·江苏无锡·六年级统考期中)There’s a red light. We ______ walk now. It’s not ______.
A.mustn’t; safe B.can’t; safely C.must; safe
( )4.(2023下·江苏南通·六年级统考期末)When drivers see people crossing the road, they ________ stop and wait.
A.must B.mustn’t C.can
( )5.(2023下·江苏宿迁·六年级统考期末)To cross the road _______, you _______ cross it when there is a red man.
A.safely; mustn’t B.safety; mustn’t C.safe; must
( )6.(2023上·江苏南通·六年级统考期末)Stop! There’s a ______ man. We ______ walk now.
A.green; mustn’t B.red; must C.red; mustn’t
( )7.(2022下·江苏镇江·六年级校考期中)Because of coronavirus epidemic(冠状病毒疫情), the people in Shanghai ______ stay at home, and they ______ go out or get together.
A.must; can B.mustn’t; must C.must; mustn’t
( )8.(2022下·江苏镇江·六年级校考期中)Drivers ______ drive on the left side of the road in the United Kingdom.
A.mustn’t B.can’t C.must
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