Give the plural of the following nouns

Kettle, bath, telephone, deed, built-in wardrobe, tree, butterfly, match, bus, glove, pie, fox, ski, taxi, bush, toe, life, photo, piano, roof, knife, study, tomato, thief, leaf, baby, fire-place, hoof, mother-in-law, storey, passed-by, ox, eye, advice, knowledge, step-mother, parent-in law.

Change into the plural.

1. The sheep is eating grass.

2. There is a potato on the plate.

3. The postman is always very busy.

4. This is lovely city.

5. The worker’s family is at home.

6. My sister has long hair.

7. Who is this woman?

8. This piano is of the latest model.

9. This baby’s toy is here.

10. His son-in-law is sitting here.

11. The key is one of the shelf.

12. Her brother-in-law is an engineer.