1. Put into the plural:
7. A sheep gives wool.
8. This is my book.
9. I am busy today.

2. Put into the singular:
7. Oranges are good to eat.
8. Classrooms have boards.
9. Schools are large buildings.

3. Add a, an, the where necessary:
7. ... book which gave me the greatest pleasure was “War and Peace” by Leo Tolstoy.
8. I must buy ... new bag.
9. ... new bag which I bought yesterday is made of leather.

5. Fill in some or any, somebody or anybody, something or anything:
11. I am too tired to do … now.
12. It was impossible to see … in the darkness.
13. Could you give me … books on English History?
14. Shall I give you … more cake?
15. I wonder if she knows … of these people. She said she didn’t know … .

7. Change the following sentences according to the pattern:
Mary is taller than John.
Mary is as tall as John.
Mary is not so tall as John.
11. My pencil is ... (sharp) ... yours.
12. Your anecdote is ... (funny) ... his.
13. The weather this summer... (bad) ... the weather last summer.
14. This contract is ... (satisfactory) ... the last one.
15. Mary’s dress is ... (long) ... her sister’s.

8. Read the following sentences with the given adverb:
7. My mother goes for a walk on Sunday. (often)
8. The trams are full in the town. (usually)
9. The student on my left makes mistakes. (always)

11. Insert some, any, one, ones as required:
7. I want some oranges. Give me this big ... .
8. We have ... new shirts on sale today. Do you want to buy ... ? This green ... is very nice.
9. Don’t make ... noise; he wants to get ... sleep.

1. Put into the plural:
7. A sheep gives wool.
- Sheep give wool.

When we want to make a singular noun plural, we usually add an "s" to the end of the noun. In this case, "sheep" is already plural, so we don't need to change it.

8. This is my book.
- These are my books.

To change "this" to its plural form, we use "these." And to change "book" to its plural form, we add an "s" to the end of the noun.

9. I am busy today.
- We are busy today.

To change "I" to its plural form, we use "we."

2. Put into the singular:
7. Oranges are good to eat.
- An orange is good to eat.

To change "oranges" to its singular form, we use "an" instead of "are." And "orange" remains unchanged.

8. Classrooms have boards.
- A classroom has a board.

To change "classrooms" to its singular form, we use "a" instead of "have." And "classroom" remains unchanged.

9. Schools are large buildings.
- A school is a large building.

To change "schools" to its singular form, we use "a" instead of "are." And "school" remains unchanged.

3. Add a, an, the where necessary:
7. ... book which gave me the greatest pleasure was "War and Peace" by Leo Tolstoy.
- The book which gave me the greatest pleasure was "War and Peace" by Leo Tolstoy.

Here, we add "the" before "book" because it refers to a specific book.

8. I must buy ... new bag.
- I must buy a new bag.

To express the idea of buying "one of many," we use "a" before "new bag."

9. ... new bag which I bought yesterday is made of leather.
- The new bag which I bought yesterday is made of leather.

Again, we add "the" before "new bag" because it refers to a specific bag.

4. Fill in some or any, somebody or anybody, something or anything:
11. I am too tired to do ... now.
- I am too tired to do anything now.

Here, we use "anything" to express an idea of doing something without specificity.

12. It was impossible to see ... in the darkness.
- It was impossible to see anything in the darkness.

Similar to the previous sentence, we use "anything" to express an idea of seeing something without specifying what it is.

13. Could you give me ... books on English History?
- Could you give me some books on English History?

In this case, we use "some" to refer to an indefinite quantity of books.

14. Shall I give you ... more cake?
- Shall I give you some more cake?

Again, we use "some" to refer to an indefinite quantity of cake.

15. I wonder if she knows ... of these people. She said she didn’t know ...
- I wonder if she knows any of these people. She said she didn't know anybody.

Here, we use "any" to refer to an indefinite quantity of people, and "anybody" to express the idea of not knowing anyone.

7. Change the following sentences according to the pattern:
Mary is taller than John.
- Mary is as tall as John.
- Mary is not as tall as John.

To change the sentence to the pattern, we replace "taller" with "as tall" and "not so tall."

11. My pencil is ... (sharp) ... yours.
- My pencil is as sharp as yours.

To compare the sharpness of the pencils, we use "as...as" construction.

12. Your anecdote is ... (funny) ... his.
- Your anecdote is funnier than his.

To compare the funniness of the anecdotes, we use the comparative form "funnier."

13. The weather this summer... (bad) ... the weather last summer.
- The weather this summer is worse than the weather last summer.

To compare the badness of the weather, we use the comparative form "worse."

14. This contract is ... (satisfactory) ... the last one.
- This contract is more satisfactory than the last one.

To compare the satisfaction level of the contracts, we use the comparative form "more satisfactory."

15. Mary’s dress is ... (long) ... her sister’s.
- Mary's dress is longer than her sister's.

To compare the length of the dresses, we use the comparative form "longer."

8. Read the following sentences with the given adverb:
7. My mother goes for a walk on Sunday. (often)
- My mother often goes for a walk on Sunday.

To indicate the frequency of the action, we add the adverb "often" before the verb.

8. The trams are full in the town. (usually)
- The trams are usually full in the town.

To indicate the usual occurrence of the situation, we add the adverb "usually" before the verb.

9. The student on my left makes mistakes. (always)
- The student on my left always makes mistakes.

To indicate the consistency of the action, we add the adverb "always" before the verb.

11. Insert some, any, one, ones as required:
7. I want some oranges. Give me this big ... .
- I want some oranges. Give me this big one.

To refer to a specific orange, we use the pronoun "one."

8. We have ... new shirts on sale today. Do you want to buy ... ? This green ... is very nice.
- We have some new shirts on sale today. Do you want to buy any? This green one is very nice.

To refer to an indefinite quantity of shirts, we use "some" before the noun. And to refer to a specific shirt, we use the pronoun "one."

9. Don’t make ... noise; he wants to get ... sleep.
- Don't make any noise; he wants to get some sleep.

To refer to an indefinite quantity of noise, we use "any" before the noun. And to refer to an indefinite quantity of sleep, we use "some" before the noun.