在英语作文中使用俗语可以增强文章的表现力和说服力。以下是一些常用的英语俗语及其含义：

A liar is not believed when he speaks the truth.

说谎者即使讲真话也没人相信。

A little knowledge is a dangerous thing.

一知半解，自欺欺人。

All rivers run into sea.

海纳百川。

All roads lead to Rome.

条条大路通罗马。

Practice makes perfect.

熟能生巧。

God helps those who help themselves.

天助自助者。

Easier said than done.

说起来容易做起来难。

Where there is a will, there is a way.

有志者事竟成。

No pains, no gains.

没有付出就没有收获。

Diligence is the mother of success.

勤奋是成功之母。

Constant dripping wears away the stone.

水滴石穿。

The early bird catches the worm.

早起的鸟儿有虫吃。

Failure is the mother of success.

失败乃成功之母。

Each day brings its own bread.

天无绝人之路。

Each man is the architect of his own fate.

命运掌握在自己手中。

Eagles catch no flies.

鸟儿都爱听自己唱歌。

在使用这些俗语时，请确保它们与文章的主题和情境相符，以增强文章的逻辑性和连贯性。