Active and passive voice..

Solution
1. Grammar is taught to us by Mrs Dev.
2. A pen was passed by him to her.
3. A painting will be given by her to you.
4. A farewell gift was given by the students to Mrs Bharve.
5. A cheque and a certificate was presented to all by them.
6. The invitation has not been sent by Mike.
7. An interesting tale was told by the storyteller to us.
8. Discount was not offered to her.