1.They have studied English since 8 years.2.The
1.They have studied English since 8 years.2.The
改错:we have studied English for about six years since I have
They have studied english for six years改为否定.they english for
I have studied English or three years since I had come here.
改正句子中的错误.i have studied English for three years since i had
They have studied English for about five years.(保持原句意思不变)
you will have studied English for six years by the time you
"—have they studied English "They have studied English for t
They have studied in the same school__six years ago.A.for B.
They will have learned English for 8years by the time they f
they have learnt English since three years ago.改为同义句
I have studied English for 7 years.(同义转换)