Question

20．-Must I go out with him？
-No，you _____．（　　）

• A． needn't
• B． mustn't
• C． can't
• D． couldn't

Answer 1

分析 ---我必須和他一起去嗎？
---不，你沒必要．

解答 答案：A．must引導(dǎo)的一般疑問句，否定回答用needn't或者don't have to，mustn't表示禁止，故選A．

點評 在回答must開頭的一般疑問句時，肯定回答用must，否定回答用needn't或don't have to．如：1）-Must I finish my homework before eight o'clock？
-Yes，you must．
2）-Must I attend the meeting？
-No，you needn't（No，you don't have to）．You can ask Tom to go instead．
2、在回答may開頭的一般疑問句時，肯定回答用may，否定回答用mustn't．如：
1）-May I watch TV after supper？
-Yes，you may．/No，you mustn't．
2）-May I stop here？
-No，you mustn't．
3、在回答need開頭的一般疑問句時，肯定回答用must，否定回答用needn't．如：
1）-Need we stay behind after school？
-Yes，you must．
2）-Need he go now？
-No，he needn't．