face to face(with)面对面地，对立地
I'd like to talk to him face to face.我想和他当面谈一谈。
face up to 大胆面对，敢于承担
You'll have to face up to your responsibilities now.你现在得勇于承担自己的责任。
fall behind 落后，落在....的后面
I've fallen behind with my work.我的工作落后了。
fall in love with 爱上某人
Whom do you fall in love with?你爱上了谁？
fall out 争吵；脱落
I don't like to fall out with my friends.我不愿同朋友争吵。
His hair is beginning to fall out in handfuls.他的头发开始一把一把地脱落。
far from 毫不，一点也不
She looked far from happy.她看起来一点也不高兴。
feel like (doing)sth.想要某物
I feel like a drink.我想喝一杯。
I don't feel like dancing today.我今天不想去跳舞。
figure out 计算出，想出
I still haven't figured out how to do it.我仍然想不出怎么去做这件事。
fill in/out 填写
Please fill your name and telephone number in the blank.请把你的名字和电话号码填在空格处。
He filled out a check of $1000.他开了一张1000美元的支票。
find out 找出，查明，发现
You can't keep that secret;somebody will find it out.你保不住那个秘密，有人会发现它。
first of all 首先，第一
First of all,let me say hou glad I am to be here.首先，我要说的是，我能光临此地是多么的高兴。
fit in with 符合，适应
Don't change your arrangements.I'll fit in with you.别改变你的计划，我会配合你的。
for a moment片刻，一会儿
His heart,for a moment,almost stopped its beating.他的心脏片刻间几乎停止了活动。
for a while 暂时，片刻
She did live in New York for a while some years ago.几年前，她的确在纽约住了很短一段时间。
for ever 永远，一直
I'll remember him for ever.我将永远记住他。
for example 例如
Now, this patient may take some meat,for example, pork,beef,mutton,etc.现在，这个病人可以吃一些肉了，例如猪肉，牛肉，羊肉等。
for good 永久地，一劳永逸地
He said that he would give up smoking for good.他说他将永远戒掉烟。
for long 长久地，很久地
I can't stay for long.我待不了多久。
for instance 例如
A lot of us want to leave now-Bill,for instance.我们中有许多人想现在就走，例如比尔。
for the present 暂时，暂且
That's all for the present.暂时到些为止。
for the purpose of 为....的目的
I'll go to London for the purpose of business.我去伦敦的目的是因公出差。
for the sake of 因为，为了....的利益
For the sake of saving a few dollars,his mother walks to work.为了节省几元钱，他的母亲步行上班。
for the time being 暂时，眼下
I am sorry I can tell you nothing about this for the time being.很抱歉，关于此事眼下无可奉告。
from time to time 时常，不时，有时
Even though the Georges have moved,we still see them from time to time.尽管乔治一家已经搬走，我们还是时常见到他们。
