Task 1. Make the nouns in bold plural. Change sentences if necessary. 1. A copy of the contract was sent to London. 2. The last leaf fell from the tree. 3. The woman standing by the window is our secretary. 4. This shoe is too large for my foot. 5. “Is this worker an Englishman or a German?” — “He is a Frenchman”. 6. The mouse was caught. 7. What is the child’s name? 8. The roof of the house was covered with snow. 9. A potato is a vegetable and a cherry is a fruit.

Task 2. Make the nouns in bold singular. Change sentences if necessary.

1. These factories produce furniture. 2. The wives of the sailors came to the shore. 3. I have hurt my feet and hands. 4. In the farmyard we could see oxen, sheep, cows and geese. 5. Do your teeth still ache? 6. These are my friends’ studies. 7. He keeps his toys in the boxes. 8. These ladies are those gentlemen’s wives. 9. The children are sitting on the benches

Task 1:
1. A copy of the contracts were sent to London.
Explanation: The word "contracts" is the plural form of "contract" because there is more than one copy being sent.
Step 1: Replace "contract" with "contracts".
Step 2: Change "was" to "were" to match the plural form of the noun.

2. The last leaves fell from the tree.
Explanation: The word "leaves" is the plural form of "leaf" because there is more than one leaf falling.
Step 1: Replace "leaf" with "leaves".
Step 2: Change "fell" to "fell" to match the plural form of the noun.

3. The women standing by the window are our secretaries.
Explanation: The word "women" is the plural form of "woman" because there is more than one woman standing.
Step 1: Replace "woman" with "women".
Step 2: Change "is" to "are" to match the plural form of the noun.

4. These shoes are too large for my feet.
Explanation: The word "shoes" is the plural form of "shoe" because there is more than one shoe.
Step 1: Replace "shoe" with "shoes".
Step 2: Change "is" to "are" to match the plural form of the noun.

5. "Is this worker an Englishman or a German?" — "He is a Frenchman".
Explanation: No change needed, as the noun "worker" is already in its singular form.

6. The mice were caught.
Explanation: The word "mice" is the plural form of "mouse" because there is more than one mouse.
Step 1: Replace "mouse" with "mice".
Step 2: Change "was" to "were" to match the plural form of the noun.

7. What are the children's names?
Explanation: The word "children" is the plural form of "child" because there is more than one child.
Step 1: Replace "child" with "children".
Step 2: Change "is" to "are" to match the plural form of the noun.

8. The roofs of the houses were covered with snow.
Explanation: The word "roofs" is the plural form of "roof" because there is more than one roof.
Step 1: Replace "roof" with "roofs".
Step 2: Change "was" to "were" to match the plural form of the noun.

9. A potato is a vegetable and a cherry is a fruit.
Explanation: No change needed, as the nouns "potato" and "cherry" are already in their singular forms.

Task 2:
1. This factory produces furniture.
Explanation: The word "factory" is the singular form of "factories" because there is only one factory.
Step 1: Replace "factories" with "factory".
Step 2: Change "produce" to "produces" to match the singular form of the noun.

2. The wife of the sailor came to the shore.
Explanation: The word "wife" is the singular form of "wives" because there is only one wife.
Step 1: Replace "wives" with "wife".
Step 2: Change "came" to "came" to match the singular form of the noun.

3. I have hurt my foot and hand.
Explanation: The word "foot" and "hand" are already in their singular forms.

4. In the farmyard, we could see an ox, a sheep, a cow and a goose.
Explanation: The words "ox", "sheep", "cow", and "goose" are the singular forms of "oxen", "sheep", "cows", and "geese" respectively, because there is only one of each animal.
Step 1: Replace "oxen" with "ox".
Step 2: Replace "sheep" with "sheep".
Step 3: Replace "cows" with "cow".
Step 4: Replace "geese" with "goose".

5. Does your tooth still ache?
Explanation: The word "tooth" is the singular form of "teeth" because there is only one tooth.
Step 1: Replace "teeth" with "tooth".
Step 2: Change "Do" to "Does" to match the singular form of the noun.

6. This is my friend's study.
Explanation: The word "friend" is the singular form of "friends" because there is only one friend.
Step 1: Replace "friends" with "friend".
Step 2: No change needed in the verb "is" as it already corresponds with the singular form of the noun.

7. He keeps his toy in the box.
Explanation: The word "toy" is the singular form of "toys" because there is only one toy.
Step 1: Replace "toys" with "toy".
Step 2: No change needed in the verb "keeps" as it already corresponds with the singular form of the noun.

8. This lady is that gentleman's wife.
Explanation: The word "lady" is the singular form of "ladies" because there is only one lady.
Step 1: Replace "ladies" with "lady".
Step 2: No change needed in the verb "is" as it already corresponds with the singular form of the noun.

9. The child is sitting on the bench.
Explanation: The word "child" is the singular form of "children" because there is only one child.
Step 1: Replace "children" with "child".
Step 2: No change needed in the verb "is" as it already corresponds with the singular form of the noun.