Задайте общие вопросы: 3 1. you have done your homework. 2. they have received our letters. 3. helen has taken her english exam. 4. his dog has found the bone.

Have you done your work?
Have they received our letters?
Has Helen taken her English exam?
Has his dog found the bone?

1.Have you done your homework?
2.Have they received our letters?
3.Has Helen taken her English exam?
4.Has his dog found the bone?
(все предложения в present perfect поэтому глагол остается в третьей форме (Ved) а to have выдвигается вперед)