however同义词替换

but 口语常用词，语气较强，泛指与前述情况相反。

still 语气强，多用于肯定句或疑问句。指尽管作出让步，采取措施或表示反对，但情况仍然如故，无所改变。

yet 常用于否定句，语气比still稍强。指不管作出多大努力或让步，仍达不到预期的结果。

nevertheless 指尽管作出完全让步，也不会发生任何影响。

while 表对比，一般可与whereas换用，但程度弱一些。

whereas 表对比，一般可与while互换。

1. The mechanics of the job, however, have changed little since then.

不过，工作流程从那以后就几乎没有任何变化。

2. The deal with Chelsea may not, however, be dead.

不过，与切尔西的交易或许还有戏。

3. What is missing, however, is an internal, artistic cohesion.

不过，缺乏的是一种内在的艺术凝聚力。

4. However, many customers found the smell of this product distinctly off-putting.

然而，很多顾客觉得该产品有一股异味，非常难闻。

5. When angry or excited, however, he could be wild, profane, and terrifying.

但愤怒或激动的时候，他也会发狂、会骂人、令人生畏。