Hey there! :)

1. He wants to drive the car by himself.

2. The children want to read the book by themselves.

3. Helen and Jane, do you want to wash dishes by yourselves?

4. Henry, do you want to repair the radio by yourself?

5. We can install this program by ourselves.

6. They can not do it by themselves.

7. She likes to make cakes by herself.

8. I'm going to cook dinner by myself.

Hope this helps! :)