将下列句子改为否定句
问题描述：
将下列句子改为否定句
1、The boys often play in the playground.
2、David learns a lot from this book.
3、The hot cottee near the clock is for the doctor
4、The girl in red studies veryhard every day.
5、Stand in a line.
6、She usually watches insects at the weekends.
7、Mike and I have four lessons in the morning.
答
The boys don't often play in the playground.
David does not learn a lot from this book.
The hot cottee near the clock is not for the doctor.
The girl in red does not study very hard every day.
Do not stand in a line.
She usually does not watch insects at the weekends.
Mike and I do not have four lessons in the morning.