Помогите пожалуйста, очень безотлагательно )!!!!!!Make the sentences negative.There are some books

Помогите пожалуйста, очень безотлагательно )!!!!!!
Make the sentences negative.
There are some books on the table.
There was somebody in the next room.
There is a map on the wall.
There is something in the box.
There will be a concert at our club tomorrow.
Task 14. Open the brackets.
There (to be) a chair in the classroom.
There (to be) only girls in our group.
There (to be) no clock on the wall in front of you
There (to be) a few pencils on the desk
There (to be) a lot of tape-recorders in the corner.
There (to be) two teapots on the desk in front of you.
There (to be) few armchairs in the hall.