介词短语在考研英语中经常出现，它们用于表达时间、地点、原因、方式等多种概念。以下是一些常见的介词短语及其用法：
时间
in the morning
yesterday afternoon
on Monday
since 2010
until midnight
地点
in New York
at the corner of Main Street and Third Avenue
next to the library
on the third floor
below the surface
原因/理由
because of the rain
for the celebration
due to the storm
in response to the request
as a result of the accident
方式/方法
by foot
through email
with the help of technology
using a map
according to the instructions
比较
compared to last year
in contrast to their rivals
in proportion to its size
目的/缘由
for the
其他常用介词短语
above all：首要，尤其
after all：毕竟，终究
ahead of：在...之前
ahead of time：提前
all at once：突然，同时，一起
all but：除了...都，几乎
all of a sudden：突然
这些介词短语在句子中可以用来修饰动词、形容词或其他介词，是考研英语中常见的考点。掌握这些短语有助于更好地理解和构造复杂的英语句子