I'm thinking about doing a little traveling,我想出去旅行一下

think about:考虑

I'll think about it while I have a chew.

我吃饭时会想想看。

think of, think about, think over 这三个词组都与“想”有关，但所表达的含义有所不同。

think of:多用来指“想起，认为”。

昨晚我睡觉前，想起了我的父母。

Last night，before I went to bed，I thought of my parents.

你认为那本书怎么样？

What do you think of that book?

think about:多用来指“考虑某事情或对某事进行思考”。

想想你所做的这一切吧！

Think about what you have done!

think over:think over意思是“仔细考虑，认真思考”。

在回答这个问题之前，请认真考虑一下。

Before you answer this question，please think it over.

I don't doubt that.我知道的

doubt:怀疑；不信任

常用短语: doubt of (v.+prep.) 怀疑(某事)

I doubt of her ability.我怀疑她的能力。

Such actions make me doubt of his sanity.这种行为使我怀疑他的神志是否清醒。

How do you doubt of the firm's future?你怎能怀疑公司的前景呢?