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

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~