they have learnt English since three years ago.改为同义句____ three years ____ they started learning English.
问题描述:
they have learnt English since three years ago.改为同义句
____ three years ____ they started learning English.
答
it is three years since they started learning English.
it is+时间段+since从句是现在完成时的句式
答
About three years ago they started learning English
答
It's since
答
It's..since