1. across:
1)穿过，跨过：
I walked across the park.
我从公园穿了过去。
There are little bridges across the canal.
在运河上有许多小桥。
2)在……对面：
The school was across the street.
学校在街对面。
He lives across the river.
他住在河对面。
3)用于下面成语：
Where did you come across him?
你在哪里碰到他的?
I ran across him yesterday.
我是昨天碰到他的。
2. after:
l)在……之后：
It is easy to be wise after the event.
当事后诸葛亮是容易的。(谚)
After saying goodbye to her，I returned home.
和她道别后我就回家了。
I'll come to see you the day after tomorrow.
我后天来看你。
2)在……后面：
Shut the door after you.
随手关门。
After you，sir.
先生，你先走。
3)仿照：
Make some sentences after this model.
仿照这个句子造句。
We act after your fashion.
我们照你的方法行事。
4)用于某些成语：
They asked after you.
他们向你问好。
I'll look after the luggage.
我来照看行李。
So you did come after all!
你到底还是来了!
Production has been increasing year after year.
生产年复一年地增产。
They rose one after another and walked out.
他们一个接一个站起身走出去。
Why would Olivia be after Jeffrey?
奥利薇亚为什么要追杰弗莱?
They jumped off the boat and ran after the men.
他们跳下船去追那些人。
