1. 【语义表述】那是某人应该做的事情。

【句型模板】Something is one’s role.

【指点迷津】role是“任务”的意思，任务就是要求某人应该去做的事情，所以这里用role来表达“应该做的事情”。

【句型操练】Looking after the youngers is my role.

照顾这些年轻人是我应该做的事情。

【句型出处】That's our role.

2. 【语义表述】礼貌地跟对方说自己要离开一下。

【口语短句】If you will excuse me.

【句型出处】Well, if you will excuse me.

3.【语义表述】某人与某人交情很好，可以共同合作某事。

【句型模板】Sb and sb. Are friends enough for something/doing something.

【句型操练】John and Mary are friends enough for allowing John to live in her house.

John和Mary的交情很好，Mary让John住在她家。

【句型出处】Or aren't we friends enough for that?

4.【语义表述】某人做某事愚蠢。

【句型模板】Somebody is a fool to do something.

【指点迷津】fool是“傻瓜”的意思，某人是个傻瓜，那就表示某人做了什么事情让人觉得他很笨，愚蠢。当然可以用形容词来表示这个语义：It is foolish of me to do something。

【句型操练】I am a fool to make such a friends with him.

我和他这个人交上朋友真是愚蠢。

【句型出处】I was a fool to bring him here.

5. 【语义表述】某人沿着山边下山。

【口语短句】Sb comes down the side of hill.

【句型出处】We came down the side of a hill...