否定句：1) They didn't have to get up early yesterday.
2) I wasn't able to go to the meeting.
3)The teacher won't be able to come tonight.
一般疑问句：1) Did they have to get up early yesterday?
2) Were you able to go to the meeting?
3)Will the teacher be able to come tonight?
二
1 needn't
2 Can,can
3 must二，用can,may,must,can't,mustn't,needn't填空1)He was ill yesterday,so he____go to school. 2)Need I water these flowers every day? —Yes,you_____. 3)His little sister_____read or write yet.三，请写出下列句子中need用作情态动词还是行为动词1)He needs to come early.（ ）2)We needn't hurry.（ ）3)Does he need to know this now?（ ）谢谢你回答我的问题1 can't 2 needn't 3 can't 1 行为动词 2 情态动词 3 行为动词三，请写出下列句子中need用作情态动词还是行为动词1)Need I write the letter now?（ ）2)You don't need to tell him the news.（ ） 99999999999个谢谢