1

3 my grandma is visited by me.

4 dinner isn't cooked by them.

2

3 my grandma wasn't visited by me.

4 dinner wasn't cooked by them.

3

3 my grandma will be visited by me.

4 dinner won't be cooked by them.

4

3 my grandma is being visited by me.

4 dinner isn't being cooked by them.

5

3 my grandma was being visited by me.

4 dinner wasn't being cooked by them.

6

3 my grandma has been visited by me.

4 dinner hasn't been cooked by them.

7

3 my grandma had been visited by me.

4 dinner hadn't been cooked by them.

8

3 my grandma will have been visited by me.

4 dinner won't have been cooked by them.

9

Her homework has to be done.

An essay has to be written by us.

10

3 dinner must be cooked.

4 the teacher couldn't be asked by her.