while until when的区别

Question

请详细一点，谢谢

Answer 1

When和While的区别
①when是at
or
during
the
time
that,
既指时间点，也可指一段时间，while是during
the
time
that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。
②when
说明从句的动作和主句的动作可以是同时，也可以是先后发生；while
则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
③由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如：
a.
When
the
teacher
came
in,
we
were
talking.
当此句改变主从句的位置时，则为：
While
we
were
talking,
the
teacher
came
in.
b.
They
were
singing
while
we
were
dancing.
④when和while
还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如：
a.
The
children
were
running
to
move
the
bag
of
rice
when
they
heard
the
sound
of
a
motor
bike.
孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。
b.
He
is
strong
while
his
brother
is
weak.
他长得很结实，而他弟弟却很瘦弱。

Answer 2

上面那位纯属瞎掰
until是直到的意思，与till是近义词，与短暂性动词连用时用“not...until"
，动词是延续性动词时直接用"until"或"till",
when引导的从句一般用一般现在时，
while引导的一般用进行时，

Answer 3

while and when is similar in expression. sometimes "while" covers a longer time frame, "when" covers only short time frame. until typically can't subsititute for either while or when. examples:

1. While I am in town, can we schedule a lunch meeting please? (meaning, I shall be in town for a couple of days, we can meet any time during the 2 day period).

2. When I am in town, can we schedule a lunch meeting please? (Same meaning)

3. Jimmy is playing guitar while Jenny is singing (meaning Jimmy and Jenny are doing things at the same time). (you can use when if you wnat to).

4. Six libraries serve the city well enough, while nine libraries suit better for the surrounding countryside. (can't use when, because it describes a long term action)

5. The baby always cries whenever he is hungry. (can't use while)

6. Don't leave until the next shift comes. (can't use when or while). (one action after another, not the same time).

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Answer 4

until 与not until的用法区别！