根据要求变化下列各句。
1. Lucy goes to school by train every day. (对画线部分提问)
_____ _____ Lucy _____ to school every day?
2. My parents are doing cleaning now. (用Tom做主语改写)
Tom _____ _____ _____ now.
3. Why don't you come earlier? (同义句)
_____ _____ come early?
4. There're two ships on the river. (对画线部分提问)
_____ _____ ships are there on the river?
5. —_____ _____ does it take by ship? (根据答句填空)
—It takes three hours.
6. The boy does some cleaning in the evening. (一般疑问句)
_____ the boy _____ _____ cleaning in the evening?
7. You mustn't talk in class. (祈使句)
_____ _____ in class.
8. Are you from China? (作否定回答)
_____, _____ _____.