如题所述
have to 变一般疑问句时在句首加DO
2 把must 提到句首。如
They have to clean the floor . -> Do they have to clean the floor ?
They must clean the floor .-> Must they clean the floor ?
加油!不明白再问!如果帮到你,请采纳,谢谢!
2 把must 提到句首。如
They have to clean the floor . -> Do they have to clean the floor ?
They must clean the floor .-> Must they clean the floor ?
加油!不明白再问!如果帮到你,请采纳,谢谢!
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第1个回答 2013-03-17
have to 的一般疑问句 用助动词 do 或者 does 开头。
must 的一般疑问句直接用 must 开头。
例如:Do you have to go now?
Must I go now?
must 的一般疑问句直接用 must 开头。
例如:Do you have to go now?
Must I go now?
第2个回答 2013-03-17
have to 可以看成一个整体,即一个动词,变成疑问句时必须用助动词来提问,和一般的动词一样用法,而must则是一个情态动词,在句子里可以直接放到句首来提问,无须再加助动词。例如:Do I have to get home at nine?我必须要在9点到家吗?/ Must I get home at nine?我必须要在9点到家吗?来自:求助得到的回答
第2个回答 2013-03-17
都用take care of my little sister 做情境
Do I have to take care of my little sister? (加在句首助动词do)
Must I take care of my little sister? (把must提前)
Do I have to take care of my little sister? (加在句首助动词do)
Must I take care of my little sister? (把must提前)