1)it / important / is / elderly people / to help? 2) it / is / difficult / leaves / to rake? 3) fun / is / to do / it / tricks? 4) to pick up / useful / is / litter / it? ​

ответ:

a toy

I/You/We/They have a toy.

He/She/It has a toy.

a cake

I/You/We/They have a cake.

He/She/It has a cake.

an egg

I/You/We/They have an egg.

He/She/It has an egg.

a child

I/You/We/They have a child.

He/She/It has a child.

a fruit

I/You/We/They have a fruit.

He/She/It has a fruit.

Объяснение о 'have/has':

Have используется из I, you, we, they

Has используется из He, she, it

Утвердительное предложение:

I, you, we, they/He, she, it + have/has +

Отрицательное предложение:

I, you, we, they/He, she, it + don't/doesn't + have +

*Заметьте - неправильно сказать "he doesn't has", например. Здесь на лицо "he" указывает вс глагол "doesn't". Также вы не можете сказать "I have not", только "I have not got" (но тут уже конструкция 'have got')

Вопросительное предложение:

Do/Does + I, you, we, they/He, she, it + have + ?

В отрицательном и вопросительном предложении, если глагол "have", добавляется вс глагол do/does.

1. Students who read a lot in English know the language better than those who read less. (Relative clause/relative clause)

2. While I was reading the book (that) you gave me yesterday, I found a lot of new words. (Adverbial clause/Relative clause)

3. I live in a house which was built more than a hundred years ago. (Relative clause)

4. Since I didn't know my friend's new address, I could hardly hope to find him. (Adverbial clause)

5. In this shop you can buy things which are made in different parts of the Soviet Union. (Relative clause)

6. Once when I was walking in the wood, I found a flower which I had never seen before.  (Adverbial clause/relative clause)

7. I always read books which describe the lives of great people with interest. (Relative clause)

8. What's the name of the teacher who's examining Group Three?

(Relative clause)

9. When we discussed this book, we found out a lot of interesting things.

(Adverbial clause)

10. When he was asked the same question, he didn't know what to say either. (Adverbial clause)

11. As I was very busy, I couldn't help them. (Adverbial clause)