掌握have to (不得不)和do not need to(不必要)的用法
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掌握have to (不得不)和do not need to(不必要)的用法
答案要多一点
答案要多一点
have to表示一种客观的需要,意思是“不得不”.如:
I have to attend an important meeting this afternoon.
今天下午我不得不参加一个重要的会议.
Mother is out,so I have to look after the shop.
妈妈不在家,因此我不得不照看商店.
2)have to的否定形式是don’t have to,相当于needn’t.如:
They don’t have to buy a computer at present.
他们目前没有必要买电脑.
should,must,need,can都是情态动词,后面都只能跟动词原形,分别解释为应该,必须,需要,可以.
didn't need to do 表示发现不必要做,最终也没有做.
I have to attend an important meeting this afternoon.
今天下午我不得不参加一个重要的会议.
Mother is out,so I have to look after the shop.
妈妈不在家,因此我不得不照看商店.
2)have to的否定形式是don’t have to,相当于needn’t.如:
They don’t have to buy a computer at present.
他们目前没有必要买电脑.
should,must,need,can都是情态动词,后面都只能跟动词原形,分别解释为应该,必须,需要,可以.
didn't need to do 表示发现不必要做,最终也没有做.
掌握have to (不得不)和do not need to(不必要)的用法
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掌握have to(不得不)和do not need to(不必要)的用法 (要举例)
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