二、表示条件时，根据情况可与虚拟语气连用。

With more money I would be able to buy it.

要是钱多一点，我就买得起了。

With better equipment, we could have finished the job even sooner. 

要是设备好些，我们完成这项工作还要快些。

三、比较with和as。

两者均可表示“随着”，但with是介词，as是连词。

He will improve as he grows older. 

随着年龄的增长，他会进步的。

People’s ideas change with the change of the times. 

时代变了，人们的观念也会变化。