He has to help his mother clean the house today 改为否定句He ------ ------- help his mother clean the house today.
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He has to help his mother clean the house today 改为否定句He ------ ------- help his mother clean the house today.
He has to help his mother clean the house today 改为否定句
He ------ ------- help his mother clean the house today.
He has to help his mother clean the house today 改为否定句He ------ ------- help his mother clean the house today.
has体现三单,所以借助助动词does进行否定.
正确:doesn't have to
He has to help his mother clean the house today 改为否定句
He 【need】【not】help his mother clean the house today。
need not do sth 没必要做某事。这里的need是情态动词,不要加s。
He has to help his mother clean the house today 改为否定句
He【need】【not】 help his mother clean the house today。(情态动词使用+not+动词原形)
He【doesn't】【have】【to】 help his mother clean the house today。
He【...
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He has to help his mother clean the house today 改为否定句
He【need】【not】 help his mother clean the house today。(情态动词使用+not+动词原形)
He【doesn't】【have】【to】 help his mother clean the house today。
He【doesn't】【need】【to】 help his mother clean the house today。(行为动词使用+to +动词原形)
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He 【has to 必须;不得不】 help his mother clean the house today 改为否定句
He 【need not】 help his mother clean the house today。
=He 【doesn't have to 】help his mother clean the house today。
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