一旦的英文

once....will.....

1、As soon as relations improve they will be allowed to go

一旦关系有所改善，他们就可以获准离开。

2、As soon as the necessity for action is over the troops must be withdrawn

一旦军事行动的必要性不复存在，军队就必须撤出。

3、We will get your order to you as soon as possible.

我们将会把您的订货尽早送达。

4、As soon as I get my money I'm out of here!

我一拿到钱就走！

5、As soon as the opportunity presented itself, she would get another job.

一有机会，她就会另谋新职。

6、As soon as he turned his back, she would make her escape.

他一转身，她就逃跑。

7、As soon as he gets here we're ready to go.

他一到我们就可以开始。

首先要区分这两个词的意思,if是如果的意思,once有一旦,曾经,一次的意思,然后看看需要填的词在句中做什么成分,然后根据if和once意思的差别来做题. once表示一旦的时候,通常接在句首,例如： Once you do it,you should do it best. 一旦做了,就要把事情做得最好. Once you kill off confidence,it takes a long time to rebuild that confidence. 一旦失去信心,那么重建信心需要花费很长的时间.

onceOnce you get into a bad habit, you'll find it hard to get out of it. 一旦染上坏习惯,想改掉就难了。