祈使句练习(答案)一、将以下祈使句改为否定式:1. Come here early. Dont come here early. 2. Ask him. Dont ask him 3. Please wait for her. Please dont wait for her 4. Read the book carefully. Dont read the book carefully. 5. Sit under the tree, please. Dont sit under the tree,please. 6. Lets go there together. Lett not go there together. (注意lets否定是 lets not)