1.by doing sth
Eg：He makes a living by doing odd job.
2.be always doing sth
Eg：The boy is naughty, but otherwise he is always doing well.
3.be terrified of doing sth
Eg：But she is terrified of speaking in front of other people.
4. be afraid of doing sth
Eg：He who is afraid of doing too much always does too little.
5.be busy doing sth
Eg：The conviction of the parent was that I should be busy doing more important things rather than finding fault with an adolescent's vocabulary.
6.be good at doing sth
Eg；He is good at speaking and most of them are not.
7.be used for doing sth
Eg：This cellar is used for storing vegetables.
8.be used to doing sth
Eg：The fact that this boss came in from the outside is significant, because it means he may be used to doing things in a different way.
9. be careful of doing sth
Eg：We have to be careful of what they are doing.
10.continue doing sth
Eg：If you continue doing what you are doing now, you are in deep trouble.