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按要求改写下列句子.He had to go to the library.(改为一般疑问句)I have had to

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按要求改写下列句子.
He had to go to the library.(改为一般疑问句)I have had to stay there for a week.(就"for a week"提问)I have to go to the station early.(改为否定句)He must finish his homework.(就"finish his homework"提问)
按要求改写下列句子.He had to go to the library.(改为一般疑问句)I have had to
He had to go to the library.(改为一般疑问句)
Did he have to go to the library?
I have had to stay there for a week.(就"for a week"提问)
How long have you had to stay there?
I have to go to the station early.(改为否定句)
I don't have to go to the station early.
He must finish his homework.(就"finish his homework"提问)
What must he do?