Did my sister help me doing my homework yesterday?
Did my sister or my farther help me doing my homework yesterday?
My sister helped me doing my homework yesterday, didn't she?
Who helped me doing my homework yesterday?
When did my sister help me doing my homework?
How did my sister help me yesterday?
Why did my sister help me doing my homework yesterday?
Did my sister help me doing my homework or cleaning the floor yesterday?
Didn't my sister help me doing my homework yesterday?