在英语中，介词是用来表示名词、代词或名词短语与其他词之间关系的词。以下是一些常用的介词及其固定搭配：
关于
about
concerning
regarding
of
例句：
I have heard a story about Europe.
She is thinking about the problem.
在...之前
before
in advance
例句：
We need to prepare the documents before the meeting.
They arrived early, so they had time to relax before the concert.
在...之后
after
behind
例句：
After the rain, the sky cleared up.
She was late because she missed the bus.
与...一起
with
without
例句：
She came to the party with her friends.
He works alone, without any help.
从...来看
in a sense
from a/one way
例句：
In a sense, this book is a masterpiece.
From one point of view, the movie was not very exciting.
按照
according to
例句：
According to the report, the company has a lot of employees.
除了...之外
besides
apart from
例句：
Besides studying, she also enjoys reading.
Apart from her studies, she has a lot of hobbies.
到...为止
up to
例句：
We have walked two miles up to the mountain top.
像往常一样
as usual
例句：
She arrived late as usual.
通过
through
by
例句：
They came to the city through the train.
She learned English by listening to the radio.
这些介词在考研作文中经常出现，掌握它们的用法和搭配有助于提高作文的准确性和流畅性。建议在平时的学习中多积累这些常用介词的用法，并通过例句进行巩固。