His height is double what it was three years ago.
what it was three years ago 为名词性关系分句,what在这里等于the heigh that。所以,这个句子等于:
His height is double the height that it was three years ago.
double为倍数词,倍数词+the/物主代词+名词=是...的n倍。例如:
His salary is three time your salary. 他的工资是你的三倍。
所以, His height is double what it was three years ago. 意为:他的身高是三年前身高的二倍。
这个句子中的He只能是个刚出生的婴儿,三岁时的身高是刚出生时身长的二倍。除此之外,这个句子表示的逻辑难以想象。
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