语法it can be rewarding or just a waste of time改成wasting time 可以吗?前面动名词 后面也因该动名词 才顺啊!为什么 变成加a 的名词

nothing can't be change, isn't it ?这句话语法对吗? “will be /can be”这类语法是什么语法,如何用. how can it be.. it can be done It can be proved. 有没有There can be这个语法 can you do it语法正确吗 i can do it 语法对吗 It can be tough.it can be strong. It can be argued that... How can it be that? you can make it.be It Can Be Done 歌词 It Can't Be 歌词 It can be a killer. I wish it can be who can it be?:can用法 一句英语的语法知识If this pencil-box is not yours ,whose can it be 这里 can 的位置 may 为什么不能用．