several years还是several year?好像有几个表示大量.几个的形容词.修饰名词时候名词不加S.都是那些形容词呢?突然想起来有这个事修饰名词时候名词不加S.的是哪些表示多少的数词啊？

sever several years前面跟什么?several years前面跟since还是for啊... several years ago in several years翻译中文 He has been （ ） for several years括号中填died 还是dead 有关the past several years witnessed the phenomenon that ……时态问题请问是the past several years witnessed the phenomenon that还是the past several years have witnessed the phenomenon that 抑或the past several years has witnessed the p sever weather sever overload Have been working for several years for several years 用于什么时态 several years ago,well-known的意思, in several years用什么时态 live for several hundred years 等于什么 Several years ago,a television reporter I ______(know) Kitty for several years. several years 与couple of years的区别… It's several hundred years old.(同义句替换) It __ __ several hundred years ago. in several years away 句子 That released into the wild in several years away.