1. decide: to make a choice that you are going to do something

例：

We'll support you whatever you decide. （不论你的决定如何，我们都会支持你。）

decide to do something

She decided to tell her mother all about it that evening. （她决定告诉妈妈那晚发生的一切。）

decide not to do something

If you decide not to accept our offer, let me know. （你要是决定不来我们公司上班，告诉我一声。）

decide (that)

I've decided that I really must stop smoking. （我决定了，我一定要戒烟。）

decide what/how/which etc

Kate took hours deciding which dress to wear. （凯特花了好几个小时来决定要穿什么裙子。）

Have you decided whether to apply for that job? （你决定了没？要不要应征这份工作啊？）

decide against (doing) something (=decide not to do something)

For a second he thought about using his gun, but decided against it. （他曾想过用枪，这个想法转瞬即逝，他最后决定不用了。）

I was so tired that I decided against going to the party after all. （我太累了，最后决定不去参加派对了。）

you decide (=used to tell someone to decide)（''you decide''常用于口语中。）

I don't mind which restaurant we go to. You decide. （去那家餐厅我无所谓，你决定就好了。）

2. make a decision: to decide after thinking carefully about something, especially about something that is very important

例：

After weeks of sleepless nights, I finally made a decision. （我几周没睡好，终于决定了。）

make a decision to do something

I think you should make the decision to marry him - he's great! （我觉得你应该嫁给他，他人很好。）

make a decision about

We don't have to make a decision about that now, let's think about it for a day or two. （我们没必要现在就做决定，再考虑一两天。）

3. arrive at/come to/reach a decision: to officially decide about something important after discussing and carefully considering it

例：

Before reaching a decision the chairman usually talks to senior managers. （主席通常会跟公司高管商量过后，再做最终决定。）

Let me know as soon as you arrive at a decision. （你一有了决定，就告诉我。）

arrive at/come to/reach a decision on/about

After two hours the committee had still not come to a decision on any of the proposals. （委员们讨论了两个小时，还未对任何提案作出最终决定。）

4. make up your mind: to finally decide that you will definitely do something, after thinking about it

例：

make up your mind what/how/which etc

I couldn't make up my mind which college I wanted to go to. （我还没定下来要上哪所大学。）

make your mind up

You'll have to make your mind up soon, or there won't be any tickets left. （你得快点决定好买不买，票快没了。）

make up your mind to do something

John had made up his mind to forget the past and make a fresh start. （约翰已经决定忘记过去重新开始。）

make up your mind (that)

She's finally made up her mind that she wants to study Law. （她最后决定了，要去学法律。）

5. choose: to decide to do something because you want to, without worrying about what other people think

例：

choose to do something

More and more young couples today are choosing not to marry. （现在越来越多的年轻人选择不结婚。）

I told him to drive more slowly, but he chose to ignore my advice. （我跟他说开得慢点，但他就是不听我的。）

6. resolve: to decide that you will definitely do something and will not change your mind about it, especially because you have learned from your past experiences

备注：''resolve''常用于正式的场合。

例：

resolve to do something

I resolved to keep quiet about what I had heard, since it would only cause trouble. （既然我听到的这些话，如果泄露出去只会引起纠纷，那我决定守口如瓶。）

After the divorce she resolved never to marry again. （离婚后，她坚决不要再婚。）

resolve that

Mary resolved that she would stop smoking. （玛丽坚决要戒烟。）