take back 吸收

take in 进入，接纳，吸收

take out 取走，弄走

take off 脱掉。起飞.

Step 3. Sentence study

1. Does their disability make it difficult for them to do some things?

　　Pattern; make +it + adj/n + infinitive

　　　For example :This made it necessary for the earth to support more people .

其他可用于这种结构的动词还有 think, feel, find, consider

2. She was proud to have recently represented her coming in an athletics competition where she won a gold medal in the 50- meter race .最近她代表国家参加了一次田径比赛并获得五十米赛跑的金牌，对此她感到很自豪。

To have done 是不定式的完成式，这种形式表示不定式的动作发生在谓语动词之前。其被动形式：to have been done

To do 表示动作将来发生，其被动形式：to be done，如：

We are glad to have seen the Greatwall..

I am glad to go out for a walk.