i learned english for four years,but i have forgotten most of it.为什么不能用 have learned呢?这句话前面的learned,为什么不能用 have learned呢?

How I learned to learn English 翻译 How I learned to lean English How I learned to learn English I [ ] English for three years 1.learn 2.learned 3.have learned 4.has learned i have been learned English before. i had been learned English before. 有什么分别? I don't wanted to have learned English.I wanted not to have learned English. 来一篇How I learned to learned to learn English,速度来How I learned to learned to learn English 不要教科书上的 英语翻译如题.翻译how i learned to learn English In the morning I learned in English是什么意思 how i learned to learn english的翻译,全部哦 英语翻译How I learned to learn English 翻译 very important How I learned to learn English如何翻译 I have learned English 变为过去式 时,have用变吗? Find a friend exchange English,I just learned. -Have you _____ learned English?-Yes,I’ve _ ___ learned a lot. I've also learned English like that的同义句 I've also learned English ____ ____ How I learned to learn English语法同上How I learned to learn English?这句话的语法 I have never learned English before.T__,I dont know a word of English.