精选优质文档-倾情为你奉上一、 重点语法解析 Past nowYesterday , we Now , the classroom cleaned the classroom. is clean because we have cleaned it. 1. My father bought many books for me yesterday . Now , I have a lot to read because _ 2. I saw this film last week. Now, I know this film because I_. 3. I did my homework yesterday. Now, I can give it to the teacher because I_