fall in for . come in for；get 受到；得到

He didn't think he would fall in for the major share of the blame.他认为他不会是受到主要指责的对象。

The coach fell in for most of the blame when his team lost the game．比赛失败后，该队教练受到的指责最多。

The girl fell in for some sympathy when she was attacked by that gangster．这女孩受到歹徒袭击时，得到了人们的同情。

fall in love . begin to love 爱上

They fell in love when they were students in high school．他们在中学时就互相爱上了。

I've fallen in love with your beautiful house．我已经爱上了你那漂亮的房子。

fall in upon .  come upon unexpectedly意外遇到

I fell in upon of my old classmates on my way home.在我回家的路上我遇到了一位老同学。

fall in upon .  visit by chance顺便访问

You are welcome to fall in upon us at any time you like．你什么时候来玩，我们都欢迎。

fall in with . meet somebody by chance 偶遇

On our trip we fell in with some interesting people.在这次旅行中我们遇见了一些有趣的人。

We fell in with some French tourists from the same hotel．我们结识了住在同一旅馆的几位法国旅游者。

fall in with .join；associate oneself with 同…合伙；联合

He has fallen in with some strange people．他跟一些奇怪的人勾搭上了。

fall in with .rejoin重返

As soon as he recovered，the soldier fell in with his company．这战士一恢复健康，就回连队去了。

fall in with .accept；agree with接受；同意

I have decided to fall in with your plan．我已决定接受你的计划。

He will fall in with any suggestion that involves eating and drinking．他对任何关于吃喝方面的建议都会接受的。

She fell in with my views at once．她立即同意了我的观点。

fall in with .coincide with；match 与…协调；相称

The colour of your coat doesn't seem to fall in with your complexion．你的上衣的颜色与你的肤色不协调。

The idea you put to us fell in exactly with what we our ourselves had in mind.你提出的主意正好与我们头脑里想的一样。

fall into . come down from a higher place落入

The child fell into the lake and had to be pulled out．小孩落入湖中，必须把他拉上来。

fall into . flow into流入

The river falls into the sea．这条河流入大海。

fall into . form；acquire 养成

Don't let children fall into bad habits．不要让孩子养成坏习惯。

fall into . begin开始

He fell into a quarrel with his classmate．他与同学吵了起来。

fall into . be divisible into分成

His book falls into four chapters．他的书分成四章。

fall into . belong to 属于

Things of a kind come together，people of a mind fall into the same group．物以类聚，人以群分。

fall into . pass into（a certain state，）进入（某种状态）；陷入

She was so tired that she fell into a doze in the armchair．她十分疲劳，以致于在扶手椅里睡着了。

The company has fallen into extreme difficulties due to the economic depression.这家公司由于经济萧条，陷入了困境。

 fall off . fall from 跌落

When you are learning to ride a bicycle，you often fall off．学骑自行车时，经常会摔下来。

fall off . decline in number； lessen in intensity 数量下降；削减

Attendance at church has fallen off this summer．今夏去教堂的人已减少。

Our sales have fallen off seriously during the past six months．我们的销售额在过去的六个月中猛减了。

The number of passengers fell off slightly in January．一月份乘客数量略有减少。

fall off . decrease；decline in quality降低；衰退；质量下降

Their enthusiasm seems to be falling off a bit．他们的热情似乎小了一点。

His support has greatly fallen off．他的支持明显减少。

The service in this restaurant has been falling off for a long time．这个饭店的服务质量长时间来一直在下降。

Your cooking is falling off．你的烹饪技术越来越不行了。

The quality of the products of this factory has fallen off．这个工厂的产品质量已经下降。

fall on . fall upon . descend on；drop on； befall落在；落到…身上

Snow has fallen on the mountains all night．山上彻夜降了雪。

Tears fell on the letter she was reading．眼泪滴在她正念的那封信上。

All the expenses fell on me．所有开销均由我付。

The responsibility of defending the country falls on all the people．保卫祖国，人人有责。

fall on . fall upon . attack；go and fight with进攻；袭击

They fell on the enemy vigorously．他们向敌人发起了猛烈的进攻。

The gangsters fell on her from behind the building．歹徒从大楼的后面向她袭击。

fall on . fall upon . come to pass on or occur on（a certain day）适逢

National Day falls on a Sunday this year．今年国庆节适逢一个星期日。

fall on . fall upon . chance upon偶然碰到；偶然发现

I'm lucky to have fallen upon you.碰到你，真幸运。

His gaze fell upon a small party of men moving up the hillside．他突然看到一小群人向山坡上走去。

fall on . fall upon . meet with（misfortune，disaster，）；encounter遭遇

He has fallen on hard times．他遭到了不幸。

She didn't lose heart even though she fell on a bad setback．虽然她遭到严重的挫折，但她仍不灰心。