8)表示一段时间：

　　They Stood quietly for a while.

　　他们静静地站了一会儿。

　　He has worked as ajournalist for ten years.

　　双当了十年的新闻记者。

　　I went to school for five years.

　　我上了五年学。

　　9)表示距离：

　　I followed him for some distance.

　　我跟了他一段路。

　　That afternoon we walked for miles along the river.

　　那天下午我们沿河走了好些英里。

　　For miles and miles you see nothing but trees.

　　多少英里你看到的只是树林。

　　10)到(开往)某地：

　　They left London for home on Friday.

　　星期五他们离开伦敦回国(家)了。

　　This is the train for Guangzhou.

　　这是开往广州的火车。

　　The ship was for New York.

　　这艘船是开往纽约的。

　　11)赞成(引起短语作表语):

　　Are you for the motion，or against it?

　　这建议你赞成还是反对?

　　How many of you are for the idea?

　　你们多少人赞成这个意见?

　　They are all for going by plane.

　　他们都赞成坐飞机去。

　　12)作为：

　　I'll keep it for a souvenir.

　　我要把它留作纪念。

　　What shall we have for lunch?

　　我们中饭吃什么?

　　The houses are now used for offices.

　　这些房子现在用作办公室了。

　　13)表示价格，工资等：

　　He sold the camera for ten pounds.

　　这个照相机他卖了十英镑。

　　The blouse is on sale, for only $10.

　　这件女衬衫减价卖，只要十美金。

　　They worked on the plantations for 75 dollars per week.

　　他们在种植园干活，每周工资75 美元。

　　14)引起短语作不定式逻辑上的主语：

　　The best thing is for you to do it yourself.

　　最好是你自己去干。

　　I've got some picture books for you to look at.

　　我有一些连环图画给你看。

　　He stood aside for me to pass.

　　他站到旁边让我过去。