6.He thinks of (leave) his job.
=> He thinks about leaving his job.
7.Please let me (know) your decision.
=> Please let me know your decision.
8.It's no use (wait).
=> It is not in use wait.
9.I have (see) a child (cry).
=> I have see a child crying.
10.Gravity makes water (run) downhill.
=> Gravity causes water running to go downhill.

1.You would be better off (buy) buying this car.
2.She refused (accept) accepted the gift.
3.Marry regrets (be) being the one to have to tell him.
4.I hope (have) have  a job.
5.Try to avoid (make) make him angry.
6.He thinks of (leave) leaving his job.
7.Please let me (know) know your decision.
8.It's no use (wait) wait .
9.I have (see) see a child (cry) crying .
10.Gravity makes water (run) running downhill.
11.Gravity keeps the moon (travel) traveling around the earth instead of (shoot) off into space.
12.It's difficult (get) getting used to (eat) eating with chopsticks.
13.It's wouldn't be safe now; we'll have (wait) wait until the reain stops.
14.I use (smoke) to smoke 40 cigarettes a day.
15.I'd like (have) to have a look at your new car.
16.I'm looking forwad to (see) seeing you.
17.He warned her (not touch) not to touch the wire.
18.Would you mind (show)  me how (work) the lift?
19.If you go on (let) the dog (run) after cars, he'll end by (be) run over.
20.Do stop (talk), I'm trying (finish) a letter.
21.Ask him (come) in. Don't keep him (stand) at the door.
22.There are people who can't help (laugh) when they see someone (ship) on a banana skin.