yet,however,while都有然而的意思,三者有什么区别,举例子.

yet(用于疑问句和否定句)

还,尚,仍

He has not come yet.

他还没有来.

She is yet a child.

她还是个孩子.

He was poor,yet happy.

他很穷,可是很快乐.

The driver's not yet conscious after the accident.

驾驶员在出事后,还没有苏醒过来.

The doctors have not yet decided how the woman died.

医生们尚未确定这位妇女的死因.

whlie只能和延续性动词连用(常用于过去进行时)

n.一会儿,时间

conj.当...的时候,虽然

vt.消磨

prep.直到

however

然而,但是

adv.无论如何,可是,仍然,究竟

conj.不管用何种方法,然而,可是

however: [ hau'ev? ]

ad. 然而

conj. 然而,可是,不过

例句与用法

1. We must do good rather than evil, on however humble a scale.

勿因善小而不为，勿因恶小而为之。

2. In one's own home, one can act however one wishes.

一个人在自己家里，可以爱怎么做就怎么做。

3. I thought those figures were correct. However, I have recently heard they were not.

我原以为那些数字正确无误。不过我最近听说并不正确。

4. However does he manage to write music when he is so deaf?

他聋成这个样子，究竟是怎样从事作曲的呢？

5. His first response was to say no. Later, however, he changed his mind.

他最初的反应是不同意。可是后来他改变了主意。

6. She felt ill. She went to work, however, and tried to concentrate.

她病了。然而她照旧去上班，并且尽力集中精神工作。

whatever: [ w?t'ev?, hw- ]

a. 不管怎样的

det. 不管什么,无论何事

pron.&conj. 无论什么

例句与用法

1. Goats eat whatever they can find.

山羊什么都吃。

2. Anyone seen carrying boxes, bags, or whatever, was stopped by the police.

谁如果带什么袋子、盒子什么的，被警察看见了都要被叫住。

3. Whatever I say, he always disagrees.

不管我说什么，他总是不同意。

4. Keep calm, whatever happens.

无论发生什么事都要保持冷静。