as you advise

入乡随俗。

as if

Without air and water, we could not exist.

要是没有空气和水，我们就无法生存。

此句是虚拟语气，介词短语without 相当于but for, 代替if条件句

(1)We couldn't _______________(succeed) without your help.

(2)We wouldn't _______________(finish) the task ahead of time

without your help.

(3)But for the rain we would have climbed the mountain.

(用if虚拟条件句替换)

_______________________________________

(4)Without electricity life would be quite different today.

(用if虚拟条件句替换)

_______________________________________

have succeeded

have finished

If it hadn't been for the rain

If there were no electricity