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