While、When、Until的区别和用法

Question

如题，请说说他们的区别

Answer 1

while
的用法
1
连词
引导时间状语从句，意为
当......时候
while
引导的句子的谓语部分必须是可以延续的动词或结构。
My
mother
is
cooking
while
my
father
is
reading
the
newspaper
.
She
fell
asleep
while
she
was
doing
her
homework
.
2
名词
意为
一会儿
after
a
while
for
a
while
After
a
while,she
came
back
.
when的用法
when
连词
意为
当...时候
...这时....
引导时间状语从句，与while
不同，when
引导的句子的谓语部分可以是短暂性的也可以是持续性的动词或结构。
She
fell
asleep
when
she
was
doing
her
homework
.
I
was
walking
in
the
street
when
I
saw
a
wallet
on
the
ground
.
I
saw
her
singing
in
the
room
when
I
passed
by
her
room
.
until
的用法
1
until是连词
引导时间状语从句
两个句型：
......(肯定句）until....
...否定句）until
....
They
worked
until
it
was
dark
.他们一直工作凌晨一点。
He
didn't
go
until
the
boy's
parents
came
back
.直到那个男孩的父母回来了，他才走。
2
介词
They
kept
him
waiting
until
o'clock
in
the
afternoon
.