as and when是什么意思

这两个介词都能表示“当…的时候”,但含义不同

1、as 表示“当随着…进展过程的时候”,如:

She sang as sheworked. 她一边工作一边唱歌。(他在工作进展的过程中唱歌)

I saw him as he wasgetting off the bus. 就在他下公***汽车的过程中,我看见了他。

You will grow wiseras you grow older. 随着你年令的增长,你会变得更聪明。

2、when 表示“在…的节骨眼的时候”

It was raining whenwe started. 我们动身时正下着雨。

We'll start whenthe team leader comes. 队长一来,我们就出发。

Turn off the switchwhen anything goes wrong with the machine. 如果机器发生故障,就把电门关上。

3、as and when 连用就把两个一是合在了一起,表示“到…的时候”,如:

We'll decide on our team as and when wequalify for the competition. 我们等到有资格参加比赛时再来决定本队参赛人员.

Dixon thought, each must enjoy himself as and when he can. 狄克逊想着, 每个人都应不失良机地纵情欢乐.

也可以单独用作状语表示“到时候”,如 I'll tell youmore as and when. 到时候我再多跟你说。