1. 含义:表达人或物的能力,“能,会”
2. 特点:情态动词can没有人称和数的变化,之后要加动词原形。
3. 否定形式:cannot (正式用法)=can’t (口语)
4. 句型结构:
肯定句:主语+can+动词原形+其他.
She/They can swim well.
否定句:主语+can't/cannot+动词原形+其他.
She/They cannot swim well.
一般疑问句:情态动词can+主语+动词原形+其他?
Can she/they swim well?
一般疑问句答语:Yes,+主语+情态动词can.或No,+主语+can't/cannot.
Yes, she/they can.
No, she/they can’t.
特殊疑问句:特殊疑问词+情态动词can+主语+动词原形+其他?
Why can she/they swim well?
当特殊疑问词是句子的主语时:特殊疑问词+can+动词原形?
Who can swim well?