In simple past tense, forming questions generally requires inverting the subject and the helping verb. With regular verbs, use "did" as the helping verb. For questions with "to be" as the main verb, simply invert the subject and "was/were."
Notice how the main verb changes in each example.
She watched the movie. -> Did she watch the movie?
He did his …
1. Sarah helped her friend with homework.
2. The children are excited about the trip.
3. They had a great time at the beach.
4. Justin has 3 cars.
5. She visits the museum every weekend.
