赶不上的英文：
can't keep up with
can't catch up with

参考例句：

Don't sleep late or you will miss the train.
不要睡懒觉,否则你就赶不上火车了

Liu Na runs so fast that nobody can catch her up.
刘娜跑的那样快，谁也赶不上他

Hurry up or we'll miss the train
快点，不然就赶不上火车了。

Fall behind; drop behind
落后;赶不上;跟不上

I don't reckon I can catch the last bus.
我看我赶不上末班车了。

What am I going to do? I am gong to miss the curfew.
怎么办!我会赶不上关门(时间的)

More often than not she misses the bus.
她经常赶不上这班公共汽车。

You've cut it short, the performance's just beginning
你差一点就赶不上了，演出刚刚开始。

Don't run - I can't keep up with you.
别跑了，我赶不上你了。

Let's say you miss the train, what do you plan to do?
假定你赶不上火车，你准备怎么办?

can是什么意思：
v. 能够，可以（情态动词）
n. 罐头；容器
v. 把（食品等）装罐保存

Canning Canning Beef can be satisfactorily preserved by canning if the proper procedures are used.
装罐如果装罐步骤正确,牛肉可很好地保存起来。

Dark thoughts can be softened when they can not be brightened.
阴郁的思绪在无法变得快活的时候可以获得安抚。

He that can have patience can have what he will.
唯坚忍者始能遂其意志。

keep是什么意思：
v. 保持，处于；继续，重复；使耽搁；抚养；履行
n. 生活费，生活必需品

That news will keep.
那个消息留待以后再宣布。

They keep a shop.
他们经营一家商店。

How are you keeping?
你最近还好吧？

catch是什么意思：
v. 抓住；捕获；撞见；赶上；感染；钩住；引起；理解；描绘；当接球手；燃烧
n. 抓住；捕获量；锁钩；隐患，陷阱；抛接球游戏；如意伴侣
adj. 使人感兴趣的；令人容易上当的

Catch as catch can.
能抓尽管抓(能拿多少算多少)。

Colds are catching.
感冒是有传染性的。

The cobweb pretends to catch dewdrops and catches flies
蛛网好象要捉露点，却捉住了苍蝇。