at the age of ... 用在什么时态？

Question

by the age of...呢？

Answer 1

　　at the age of ...用在一般过去式。at the age of ... 意思是：在......岁时。
　　例句：① At the age of thirty, Mary began to lose colour. 玛丽在30岁的年纪就红颜渐逝了。
　　　　　② He ran away from home at the age of thirteen. 他十三岁那年就离家出走了。

Answer 2

at the age of 在某一岁数；在……岁时
by the age of 在某一岁数之前；到……岁时

前者一般用在过去时态
后者一般用在将来时态！本回答被提问者采纳

Answer 3

用一般过去时