if语句的经典例子（if语句的三种形式举例）

1.He drinks what is left in his glass as if it were water.他把杯子里剩下的东西当水一样全喝了下去。

2.Customers will only incur additional call charges if the call is diverted outside the UK.只有当电话被转接到英国之外，客户才会被加收额外的电话费。

3.He gave great encouragement to his students, especially if their passions happened to coincide with his own.他给予学生莫大的鼓励，尤其是当他们与自己志趣相投时。