还是我this is the pen used by me 再问一个 在么?I saw her clean the classroom.这个是不定式 I saw her cleaning the classroom.这个现在分词 能否用 过去分词 代替过去 I saw her cleaned the classroom` 效果和I saw her clean the classroom 效果是否一样·谢谢是否等同于I saw her clean the classroom 等于I saw her cleaned the classroom 等于 从句i saw her who cleaned the classroom.那 i saw a man work in the garden.= i saw a man worked i nthe garden i saw a man who was working in the garden 是否等同于i saw a man worked in the

不一样，-ed 表示干完了， to do 表示将要干什么

只有 saw her clean the classroom 没有see her cleaned the classroom , see sb do sth 或 see sb doing sth 这是固定搭配 不能改的

see somebody do something 或者see somebody doing something.这是固定搭配.不用加to.
I saw her clean the classroom和I saw her cleaning the classroom都着重于她清洁这个行为动作.
i saw her who cleaned the classroom着重于我看到她这个人,而这个人刚好是清洁教室的那个人.
i saw a man work in the garden.觉得这个语法好像不对.但不知道为什么不对.如果改成i saw a man working in the garden就可以.
i saw a man worked in the garden觉得是对的,但不确定.是说我看见了一个男人在花园工作,而且讲的是在过去发生的事.还是觉得i saw a man working in the garden比较对.
i saw a man who was working in the garden 和i saw a man worked in the garden应该是一样,不过同上,觉得i saw a man who was working in the garden或者i saw a man working in the garden比较对.