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

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Hisfatherbegantoworksincehewassevenyearsold.这个句子有错吗?Hisfatherbegantoworksincehewassevenyearsold.这个句子

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

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

不能是since只能是when

began 改为has begun

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