have to 是词组。表示 不得不。建议和MUST一起学习。它是情态动词里的词组,但用法类似实意动词。1 have to的用法I have to get up early tomorrow morning.我明天早晨必须(不得不)早起。1.have(has)to +动词原形have(has)to后面要用动词原形。当主语为第三人称单数时用has to~,当句子是过去时用had to~。We have to leave now.我们不得不现在就离开。He has to work on Sunday.他不得不在周日工作。I had to do my homework last ...