好久不用英语了 麻烦告诉下这几个的用法

about 关于,附近,大约,周围,随身.
I have bought a book about Shakespearean.
我买了一本有关莎士比亚的书。
There are about fifteen trees in the picture.
图片里大约有十五棵树。

above 在....上,高出,以上,超过,在...上游.
The plane is flying above the clouds.
飞机在云上飞行。
I think the man is above sixty years old.
我想那人有六十多岁了。

across 横过,对面,交叉,在...的对面.
Can you swim across the river？
你能游过河吗？
We live across the street.
我们住在街的对面。

after 在...后面,依照.
He went home after school.
他放学后就回家了。
Read after me, please.
请跟我朗读。

against 撞到，靠着,反对,违背,
The car hit against the tree.
汽车撞了树。
He is standing against the wall.
他靠墙站着。

along 沿着,顺着.
They are walking along the river.
他们沿着河行走。

among 在...当中.
He is the tallest among them.
他是他们当中个子最高的。

around 在...的周围,在...那一边.
They sat around the table talking the news.
他们绕桌而坐谈论新闻。
There i