Question

急急急！！His father began to work since he was seven years old. 这个句子有错吗？

Answer 1

有语病！可以有两种改法：
1.since改为when
2.began to work 改为has worked。

Answer 2

主从句的时态不统一，要么把前面的变成完成时，要么把since换成when

Answer 3

began 改为has begun

Answer 4

不能是since只能是when