英语介词短语，动词短语，名词性短语怎么区别？在句子中做什么成分

介词不能在句子中独立充当一个成分，而需要与其后面的宾语相结合，成为介词短语，在句中充当一个成分。介词与其他词类或成分结合后方能在句子中充当语法成分，构成介词短语。介词短语可以作定语(须后置)、状语、表语、宾语补足语、另一个介词的宾语，间或作主语等。

例如：

The

skyscraper

in

the

distance

isa

five-star

hotel.(定语)

Her

eyes

were

tired

from

long

reading.(状语)

The

decision

is

of

great

importance

to

me.(表语)

They

found

the

machine

in

a

bad

state.(宾语补足语)

A

pretty

girl

appeared

from

behind

the

curtain.(介词宾语)

On

purpose

or

not

on

purpose

is

of

great

difference.(主语)

动词短语

1.

动词(verb)

+

介词(prepositional)

例：This

plan

will

call

for

a

lot

of

money.

2.

动词(verb)

+

副词(adverb)

例：I

will

call

up

a

friend.

3.

动词(verb)

+

副词(adverb)

+

介词(prepositional)

例：The

company

called

their

products

back

in

for

repairs.

英语的名词性词组,首先是一个词语组合,然后它具有名词的性质和功能,通常由修饰语（名词、形容词、代词、分词及其短语、介词的短语、不定式以及它们的各种组合）和中心词（即名词）构成.

例如：a

question一个问题

a

difficult

question

一个难题

a

very

difficult

question

一个非常难的问题

a

very

difficult

English

question

一个非常难的英语问题

a

very

difficult

English

question

asked

by

him一个他问的非常难的英语问题

等等.

remain 是保持 原来状态 (关键在"状态" )

remain standing, seated 一直站着,坐着

maintain 维持/保持

maintain good relations.维持良好的关系

continue是继续，比如the story continues，和前两个没啥一样的

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