I have konwn Sandy since two years ago 改为同义句

问题描述:

I have konwn Sandy since two years ago 改为同义句

I knew him for two years。意思是:我认识Sandy两年了,与上句的:我从两年前认识了Sandy。是一样的意思。

I have konwn Sandy since two years ago.
=I have known Sandy for two years .
=I knew Sandy two years ago .