Sure, here are the correct forms of the verbs for each sentence:

1. Up to now the teacher **has given** us a lot of homework.
2. Where is John? **He is** in the garden.
3. My aunt **did not come** to my birthday party last night.
4. It **rains** much in summer.
5. She **washes** the clothes every day.
6. The swimming pool **opens** at 7:00 a.m and **closes** at 6 p.m.
7. They **have worked** in this city for 3 years.
8. Look! The boy **is running** after the bus.