改成否定句：1.Please speak fast.2.You must say it in English.3.You

1. Don't speak fast.
2. You mustn't say it in English.
3. You mustn't talk in the library.
4. Don't come early tomorrow.
5. I can't see anyone under the tree.



希望能帮到你,祝更上一层楼O(∩_∩)O
有不会的欢迎再继续问我(*^__^*)