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hAvE to的用法

译为:不得不 have to do sth 不得不做某事 比较客观,表示:(因客观原因)不得不

一、have to 与其他情态动词一样也是后接动词原形,表示外界的强制作用,强调被迫性.含有不情愿的色彩,常译为“必须,不得不”. 二、have to 可用于多种时态,而且

相同点;都表示“必须”要做的事;不同点:(1)must是情态动词,没有时态的变化,表示现在和将来必须要做的事;(2)have to中的have是实义动词,过去式为“had to ” (3)表示态度上must表示主观(个人的观点必须);而have to表示客观的(强调外界的影响)译成“不得不”

have to更强调客观事实所迫使人不得不去做某事,而must更强调人的主观意思要求别人必须做某事.例如:my father is ill,I have to stay at home and look after him.(父亲生病是客观的事实,使我不得不呆在家照顾他.)You must do your homework first.(这是说话人的主观意识要求别人先做家庭作业.)

有 had to 是一般过去时,have to 是一般现在时.

表示不得不 必须 是客观的

have been to 去哪现在已经回来have gone to 去哪现在还没回来.都用在现在完成时态当中.例如: I have been to Dalian four times 我去大连四次了(说明现在已回来) He has gone to Dalian , he will be back in two days. 他已经去大连了,两天后回来.(去还没有回来)

不得不做某事 have to do sth

首先记住:have to do sth 是实意动词或行为动词.I have to do the housework every day. I had toI don't have to do the housework every day. I didn't have toDo you have to do the housework every day. Did you have to?Yes, I do. Yes, I did.No. I

have 有 i have sthhave to 不得不. i have to do sth=i must do sth

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