You can do it.
He can’t cook the meal.
Can she sing that song?
We must follow the traffic rules.
You mustn’t hit others.
Must I wash my hands before lunch?
You should finish your homework on time.
He shouldn’t shout at his parents.
Should they go to the concert?
She said that she could write the articles.
以上的can,can't,must,mustn't,should,shouldn't,could等单词均为情态动词.
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