把“He has studied English for 6 years.”改为同义句~

问题描述:

把“He has studied English for 6 years.”改为同义句~
He has studied English for 6 years.
改为同义句:
He has studied English ______ ______ .
要填锝只有 两个
因为大家填滴答案都在三个空以上~所以紫璇决定由大家投票决定哦~

He has studied English since 6 years ago.