作业帮He must do his homework now,________?
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/11/05 21:56:50
He must do his homework now,________?
(A) mustn't he
(B) needn't he
并说明理由
(A) mustn't he
(B) needn't he
并说明理由
A
当陈述句部分有情态动词must时,反意疑问部分有四种情况
（1）must表示“必须、禁止“时,反意疑问部分要用must (mustn’t) .
例 You mustn’t stop your car here,must you?你不能把车停在这地方,知道吗?
（2）must表示“有必要”时,反意疑问句部分要用needn’t.
例 They must finish the work today,needn’t they?他们今天必须要完成这项工作,是吗?
（3）当must用来表示对现在的情况进行“推测”时,反意疑问部分要根据must后面的动词采用相应的形式.
例 He must be good at maths,isn’t he?他数学一定学得很好,是吗?
（4）当must用来表示对过去的情况进行“推测”（must + have done）时,如强调对过去情况的推测（一般句中有过去的时间状语）,反意疑问句部分要用“didn’t + 主语”；如果强调动作的完成（一般没有过去时间状语）,反意疑问句部分要用“haven’t / hasn’t + 主语”.
例 She must have read the novel last week,didn’t she?她上星期一定读了这本小说了,是吗?
You must have told her about it,haven’t you?你一定把这事告诉她了,是吗?
当陈述句部分有情态动词must时,反意疑问部分有四种情况
（1）must表示“必须、禁止“时,反意疑问部分要用must (mustn’t) .
例 You mustn’t stop your car here,must you?你不能把车停在这地方,知道吗?
（2）must表示“有必要”时,反意疑问句部分要用needn’t.
例 They must finish the work today,needn’t they?他们今天必须要完成这项工作,是吗?
（3）当must用来表示对现在的情况进行“推测”时,反意疑问部分要根据must后面的动词采用相应的形式.
例 He must be good at maths,isn’t he?他数学一定学得很好,是吗?
（4）当must用来表示对过去的情况进行“推测”（must + have done）时,如强调对过去情况的推测（一般句中有过去的时间状语）,反意疑问句部分要用“didn’t + 主语”；如果强调动作的完成（一般没有过去时间状语）,反意疑问句部分要用“haven’t / hasn’t + 主语”.
例 She must have read the novel last week,didn’t she?她上星期一定读了这本小说了,是吗?
You must have told her about it,haven’t you?你一定把这事告诉她了,是吗?
He must do his homework now,________?
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He must do his homework.改成一般疑问句
He plans ________(watch)TV after ______(do) his homework
_Jack_[do]his homework now?
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must l do my homework now?
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() he often ()(do) his homework?
Does he do his homework?