I don't feel very well.我感觉不舒服。

这是一个谈论身体情况的句型，可根据实际情况选用其它的词或其它的句型。例如：

I am feeling ill.

我感觉病了。

I feel bad.

我感觉有病。

I think I catch a cold.

我想我感冒了。

I've got a headache and a cough.

我头痛还咳嗽。

★　What's the trouble?

What's the trouble?怎么会事？

相当于what's the matter?或者What's wrong?例如：

You look ill.What's the trouble?

你看起来有病，怎么会事？

What's the mater?I help it is nothing serious.

怎么会事，我希望不要紧。

"What's wrong?""I can't find my book."

“怎么啦？”“我找不到我的书。”

★　I think it'll be all right for him to go to school.

I think it'll be all right for him to go to school.我认为他去学校是没问题的。

It is +形容词to do….表示“干某事是…。”。这是一个动词不定式作主语的句型，但不写在句首，用it 代替。不定式前可加for…短语，作不定式的主语。例如：

It is easy for me to take the books to the classroom.

对我来说，把书带到教室里很容易。

It's very important for us to study English well.

对我们来说，学好英语很重要。

It is difficult to finish the work today.

今天完成工作太困难了。

★　I don't know where to go.

I don't know where to go.我不知道到哪儿去。

Where to go 表示“去什么地方”，在英语中，动词不定式可以带有疑问词。用法不变，只是多加了含义。例如：

Can you tell me how to go to the zoo?

你能告诉我怎样去动物园吗？

I don't know what time to start.

我不知道什么时间开始。