have to与 have got to的区别

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 o’clock.
本人必需10点前返回来.
I haven’t got to work tomorrow.
本人明天不用上班.
I’ve 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 don’t usually have to 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 didn’t 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.。