I had studied English for eight years before I became a teac

改正句子中的错误.i have studied English for three years since i had I have studied English for 7 years.(同义转换) I have studied English for 7 years.同义句 为什么I had worked in a car factory for two years before I came I have studied English or three years since I had come here. He had studied English for a year before he came here 其中的bef I have studied English for five years __________ I was ten y I have studied English for three months. I remember my sister has studied English for 5 years in Chin I have studied English for five years.(转为同义句）, What's more ,I have studied English for seven years 转化为同义句 改错：we have studied English for about six years since I have