1、1,在表示一次性动作时,have to 和 have got to 是能够互换的：I have (got) to be back by ten oclock.本人必需 10 点前返回来.I havent got to work tomorrow.本人明天不用上班.Ive got to do something!Langdon thought.兰登想：“本人得做点什么!” 2,但是,当表示习气性动作时, 特别是当句中含有表示经常性的副词（如always,often,sometimes 等）时,则应运用 have to ,而不运用 have got to:I dont usually have t
2、o work on Sundays.通常本人再星期天不用工作.I often have to get up at 5.本人常常必需五点起床.3,have to 与 have got to 的另一区别,就是后者不大用于过去时.They didnt have to worry about money.他们那时不用为金钱而操心.I had to walk very fast to overtake you.为了赶上你,本人不得不走得很快.4,最后一个区别, 就是 have to 前可加助动词或神态动词,或者用在停止体和完成体构造中 ,而have got to 却不能：I shall have to help him as much as I can.本人将不得不尽本人所能去协助他.He may have to cancel his plan.他或许不得不取消这个方案.People are having to boil their drinking water during this emergency.在这个紧急状况下,老百姓必需煮沸他们的饮用水.The administration has had to make unpopular decisions.行政部门不得不做出不得人心的决议.
