
只有以重读闭音节结尾,才需要双写+ing .
闭音节一般是以辅音结尾的.而y是半元音.
所以不须要双写最后一个辅音字母再加ing.
Part of my pay cheque went towards buying a CD player.
我的部分工资花在买激光唱片机上。
If I lose this job, we can forget about buying a new car.
要是我丢掉这份工作,我们就别想买新车。
The figures are a useful guideline when buying a house.
买房时这些数据很有参考价值。
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