How to answer the grammar exercises?

1. Add -ing: stop → stopping, lie → lying, etc. 2. Put the sentences into the interrogative form: 1) Are musicians performing? etc. 3. Present continuous: 1) He is playing, 2) She is watching, etc. 4. Write sentences about yourself using expressions: e.g., 'Now I am studying English'. 5. Correct mistakes: 1) I love eating..., 2) He always eats...