The coat cost me as much again as the last one I bought.

这件衣服的价钱比我上次买的那件贵了一倍。

The coat cost me half as much again as the last one I bought.

这件衣服的价钱比我上次买的贵了半倍。

again 之前出现 half，便减少一半。表示贵了半倍。

以下实例可以说明 again 表示倍数的常用句型的区别：

as many/much again as         是……的两倍/比……贵一倍

half as many/much again as   是……的一倍/比……贵半倍

He has as much money again as you. 【注意：句中无 half】

他的钱是你的两倍。 （或：他的钱比你的多一倍。）

This building is half as tall again as that one.

这幢大楼比那幢大楼高一半儿。（或：这幢大楼是那幢大楼的一倍。）

The coat cost me half as much again as the last one I bought.

A. 这件衣服的价钱比我上次买的贵了半倍。

B. 这件衣服的价钱比我上次买的贵了一倍。

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