used to 后加什么？

be used to doing sth习惯做某事；

be used to do sth被用来做某事；

used to do sth过去常常做某事.

All I know is that she used to work in a bank.

我只知道她曾在银行工作过。

Things ain\'t what they used to be.

现在情况不比从前了。

You used to see a lot of her, didn\'t you?

你过去常见她吧？

Computer software can be used to simulate conditions on the seabed.

计算机软件可用于模拟海底状况。

The money will be used to regenerate the commercial heart of the town.

这笔钱将用来发展壮大市镇的商业中心。