had to do信息详情
不得不做某事
had got to do───必须做…
has had to do───不得不这么做
had better to do───最好还是这样做
had to───不得不，必须（haveto和hasto的过去式）
had better to do sth───最好做某事
we had to───我们不得不这么做
had to go───我得走了
do to do───待办事项
had───aux.已经（用于过去完成时和过去完成进行时）；v.有；吃；得到（动词have的过去式和过去分词）
They'd been enslaved and had to do what they were told.───他们已经沦为奴隶，不得不唯命是从。
he had to do was decode it and pass it over.───他所要做的就是解译它，然后把它发过去。
I had to do some quick thinking.───我得迅速思考一番。
Doing what he had to do: not the kind of duty imposed by someone else, or by the state, but the kind that one chooses for oneself.───他做了该做的事：不是那种别人强要他做的，或者履行国家的义务那种事，而是他本人选择的那种。
To do it before Christmas we had to do it last week so I rushed a bit my decision but it was the only opportunity.───如果要在圣诞前租借，那么上周必须做决定了，所以我决定得很急，但那是最后的机会了。
There was something beyond that and it had to do with understanding the pain of others, especially those from the other side of the mirror.───然而有些事远超过这个的重要，那就是理解他人的痛苦，尤其是那些身处镜子另一侧的人们。
If Dong Mingzhu had to do it all over again, she says she would've been a soldier.───如果人生可以重来，她说不想再当名战士。
And that was one of the more complex things we had to do for that arc, was we had to create a whole new civilization.───这也是我们必须为这三部曲所做的更复杂的事情中的一件——我们必须创造出一个全新的文明。
With her mother being sick, she had to do all the housework.───由于她妈妈病了，她得做所有的家务。
All he had to do was decode it and pass it over.
During the flood we had to do without luxuries.
The top secret documents had to do with the most advanced military equipment.
I had to do some quick thinking.
The thought of how much work she had to do discouraged her.
I suddenly realized what I had to do.
Sonia explained briefly what we had to do.
They've been enslaved and had to do what they were told.
He felt that he had to do it.