Decide vt. 决定；解决；判决 vi. 决定，下决心
decide on 决定；选定
decide for 作对…有利的决定；赞成做某事
decide to do 决定做某事
decide upon vt. 考虑后决定；对…作出决定
decide against 决定不；作出不利于…的判决
decide to do sth. 决定做某事，例如：
1.He decides to go to Hong Kang on vacation.
他决定去香港度假
2.He decided not to call his mum.
他决定不打电话给他的妈妈
3.I decide not to go swimming this weekend because I have a lot of homework to do.
我有许多作业要做所以我决定这周末不去游泳了。
4.When the weather began not to rain, I decided to go home.
当天没有下雨时 我决定回家。
5. I decided to go home this weekend.
这个周末我打算回家
6.Be sure that you decide on your colors well in advance.
确保实现选定你拍照要用的颜色。
7.When you decide to do some things, stick to it.
当你决定做某事时，要坚持到底。
8. If you decide to do you own make-up, here are a few valuable tips that will help you look your best.
如果你决定自己化妆，这里有一些有用的小窍门，可以帮助你呈现最美的一面。
9. I have decided to work hard for our company.
为了我们公司，我已经决定努力工作。
10. I have decided on working hard for our company.
我已经决定为了我们公司努力工作。
11. They decide to have a trip.
他们决定去旅游。
12. She was still young, he said, and that would be taken into account when deciding her sentence.
她还年轻，他说，这一点对裁定关于她的判决时要考虑进去。
13. What happens next could decide their destiny.
接下来发生的事可能会决定他们的命运。
14. The election will decide if either party controls both houses of Congress.
这次选举将决定是否由任一党控制国会两院。
15. He decided Franklin must be suffering from a bad cold.
他断定富兰克林肯定是得了重感冒。