Question

His father began to work____ he was seven years old.

His father began to work____ he was seven years old.
A. as old as B. as early as C. since D. while 究竟选B 还是C , 为什么？

Answer 1

Bbegan开始，瞬间动词，后面的时间状语应该是一个时间点，就是三岁的时候而Csince表示从三岁开始一直，就是一段时间D也是一样，也是一段时间还可以用wehn

Answer 2

since前的主句用现在完成时，而这里是began过去时，所以不可用

Answer 3

C我父亲自从7岁就开始工作了。

Answer 4

B 。选C的话前面就不是用began了，要选用一般完成时。 不知道对不对，借鉴一下咯。