有没有since three years这样的说法?

有没有since three years这样的说法? 这两个英语句子有何区别1.I have studied English since three years ago.2.I have been studing English since three years ago.他们在表达上有何区别,或者有没有什麽错误? It three years since I smoked.翻译 it is three years since i have seen himit is three years since i saw him有什么不同.表达效果还是意思什么的? I have known sandy since three years ago以 since three years ago ,提问 英语翻译她离开班级已有三年。这好像是关于since的语法 例如：it was three years since he smoked a cigar==it was three years since he stoped to smoke cigar since后加现在完成时和一般过去时的区别比如It's three years since he has worked there.和It's three years since he worked there.有什么区别 he worked here three years ago用since three years ago改写句子 She have bought the computer since three years ago It's three years since he was married .的翻译 一道英语选择题：We friends since three years ago. It is three years since she was in the I have joined the club since three years ago __ three years ago.A,since B,for C,about Mary ____ ____in China since three years ago .填什么 Three years ___(pass)since I left school.急! Mr Green has been in Beijing since three years ago. It'sbeen three years since Isaw you last.什么意思?