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[英语语法手册]情态动词--have to

have to have to加动词原形 表示"不得不"、"必须"的概念。它比must更含有"客观条件使得必须如此做"的意思,并有较多的时态。如: Mr. Johnson has to work very hard to earn a living.约翰逊先生为了谋生不得不拼命干活。 I had to leave the party early last night. I wasn't very well.昨晚我只得早点离开晚会,我不大舒服。 We will have to get u...

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