как образовать форму множественного числа a bike?

1. If you dont take your umbrella, you can get wet
2. Look! There are dark clouds on the sky. It might rain soon.
3. I have to do some shopping today.
4. He should not smoke.

A farm...
A park..
A box..
A fox
A potato..
A tomato..
An apple..
A nut...
A carrot..

Fish, woman, foot, money, leaf, information, shelf, box, child, sheep, city, boy, day, knife, family, pen, book, music

№2. Поставьте существительные в следующих предложениях во множественное число (обратите внимание на изменения в указательных местоимениях и формах глаголов):

1. He keeps his toy in a box.
2. This town is very large.
3. The student put his book on the desk.
4. That house is new.
5. Is this a good student?
6. What is your name?
№3. Поставьте существительные в следующих предложениях в единственное число (обратите внимание на изменения в указательных местоимениях и формах глаголов):

1. Your children are very good.
2. My feet are tired.
3. These flowers are beautiful.
4. Those are boxes.
5. Are there mice under the bed?
6. My teeth are yellow.