A bed is in my room.(改一般疑问句);please take these books to school.改为否定句

问题描述:

A bed is in my room.(改一般疑问句);please take these books to school.改为否定句
at,your,can,look,hat,new,i(?)
this,is,sofa,a,on,backpack(?)连词成句

Is a bed in your room?
Please don't take these books to school.
Can I have a look at your hat?
Is this a backpack on sofa?