同义句He has been learning English for six years改为时间在前,事在后的形式.谢

it has been six years since he started to learn English.

Six years ago he started to learn English.
It has been six years since he started to learn English.

There are six years since he learned English.

It has six years since he learned English

Six years ago, he begained studying English.

for six years has he been learning English
时间状语提前 主句倒装

It is six years since he began learning English

It is six years since he learned English.
He has been learning English since six years ago.

For six years he has been learning English.

it has been six years since he learns english