1、This is an orange.(改成复数形式)
2、I have many books.(改成一般疑问句)
3、Is this your pencil.(改成陈述句)
4、My mother is nice.(改成感叹句)
5、He will go to school tomorrow.(改成否定句)
6、You can't sit here.(改成祈使句)
7、You can't walk on the grass.(改成祈使句)
8、It's a beautiful flower.(改成感叹句)