Question

convert it into past tense..1. Do not press the tube very hard while making scratch with the triangular file 2. Make a single deep scratch 3. Do not heat the tube for a long time 4. While heating keep the tube rotating. 5. Do not put hot tube on table.​

Answer 1

1. Did not pressed the tube very hard while making scratch with the tringular file.
2. Made a single deep sratch.
3. Did not heat the tube for a long time.
4. While heating kept the tube rotating.
5. Did not put hot tube on table.

Hope it helps you.