need做情态动词时的肯定句，否定句，一般疑问句例句

Question

如题所述

Answer 1

用于表示“需要，必要”之意。做情态动词时，仅用于否定句和疑问句，只有现在时，过去式要用needn't have，疑问式用need+人称?,否定式用need not(即needn't），
1．—Need we leave soon?

—Yes, you must.(No, you needn't)

2．You needn't have hurried.

(=It was not necessary for you to hurry，but you did).你当时不必这么匆忙。
3.He needs to see a doctor.(need to do)追问

汉语

Answer 2

用于表示“需要，必要”之意。做情态动词时，仅用于否定句和疑问句，只有现在时，过去式要用needn't have，疑问式用need+人称?,否定式用need not(即needn't），
1．—Need we leave soon?

—Yes, you must.(No, you needn't)

2．You needn't have hurried.

(=It was not necessary for you to hurry，but you did).你当时不必这么匆忙。
3.He needs to see a doctor.(need to do)

Answer 3

在肯定句中need 不用作情态动词
You needn't go to school, for today is Sunday.
Need I finish the work today?追问

汉语

追答

你不必上学，因为今天是星期天
我今天需要完成这项工作吗？
否定句：needn't +动词原形
一般疑问句：Need+主语+动词原形...?