have to後面加什麼形式

We may have to take military action.

我們可能不得不採取軍事行動。

We have to set a time limit for the work.

我們得為這項工作規定個期限。

Now she won't have to go out to work any more.

現在她不必再出去工作了。

I'd love to come, only I have to work.

我很想去，但是我要上班。