当to为介词时，后面加动词ing,常见的有：
1. be / get used to习惯于
（区别be used to do sth 。被用来做某事 )
She isn't used to living with strangers.她不习惯与陌生人住在一起。
2. get down to开始认真（做某事）
While the weather is fine, I must get down to repairing the house. 趁着天气好，我得着手修理房屋了。
3. lead to通向；导致
The new evidence led to the thief being caught.
4. look forward to盼望；期待
I look forward to receiving your reply.我期待着你的答复。
5. pay attention to注意
Pay attention to your spelling when you're writing something. 写东西的时候要注意拼写。
6. prefer doing to doing宁愿……不愿……
He prefers walking to taking crowded buses. 他宁愿走也不愿乘拥挤的公共汽车。
7. stick to坚持
She sticks to reading the foreign language every morning. 她坚持每天早晨读外语。
8. object to反对；不赞成
Do you object to smoking? 你反对抽烟吗？
9. point to指着
He asked, pointing to the man over there. 他指着远处的那个人问道。
10. see to照料；照顾
I've got some personal affairs that I have to see to.我有一桩私事要去处理。
11. be up to从事于
I'm going to see what you are up to. 我要去看看你在干什么。
12. belong to属于（没有被动语态）
The fire also destroyed cars which belonged to people who worked in the building. 大火烧毁了大楼工作人员的汽车。
13. get close to接近
He got close to being killed in the accident. 在事故中他差一点遇难。
14. drink to为某事干杯
Now let's drink to the success of your schooling! 现在，让我们为你学业有成干杯！
15. devote ... to献身于；致力于
She devoted her life/herself to helping homeless children.她把全部身心倾注于帮助无家可归的孩子们。
16. in addition to除……外
In addition to studying English, he had to study a second foreign language. 除学英语外，他还得学习一门第二外语。
17. on the way to正要成为
She is now at college and on the way to becoming a teacher. 她目前在上大学，将要成为一名教师。
18.give one's life to doing sth 。
献身于做某事
19.make a contribution to doing sth 。
为某事做贡献
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