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Unit4: Environment Topic: How to Preserve Environment Mattayomsuksa 4

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Unit4: Environment

Topic: How to Preserve Environment

Mattayomsuksa 4

Vocabulary

extinct

habitat

rainforest

timber

tribal

tropical

Structure

Present Perfect Passive

Subject + v. to have + been + verb 3

- The large areas of forest have been destroyed to make soya fields.

For example

- A house has been built by them.

- That temple has been visited by many tourists.

Active: I have written a story.

Passive: A story has been written

by me.

Active: I have not received a telegram.

Passive: A telegram has not been received by me.

Active: Have you kept the secret?

Passive: Has the secret been kept

by you?

Changing active into passive

Active: She has done her work.

Passive: Her work has been done by her.Active: She has not cheated anybody.

Passive: Nobody has been cheated by her.

Active: Why have you told a lie?

Passive: Why has a lie been told by you?

Activity 1

1 3 4 52

9876 10

Borrow mine

1._______ Rainforests are valuable habitats.

T / FTrue

2._______Eating a beef burger may be helping to protect the rainforest.

T / FFalse

3._______If you buy an orchid, check that it has been grown in Britain.

T / FTrue

4._______There are 45,000 species of plants live in the rainforests becoming extinct.

T / FFalse

5._______Some parrots and macaws are fortunately still imported.

T / FTrue

6._______Buying products made up of tropical hardwoods are protection the forests.

T / FFalse

7._______The tribal people of the forests have great knowledge of use the forest plants in medicines.

T / FTrue

8._______Rainforests provide us with oxygen and help to regulate the world' s climate and atmosphere.

T / FTrue

9._______The area of rainforest the size of Britain isn’t destroyed every year.

T / FFalse

10._______Before buying a burger, ask where the cattle came from and what they were fed on.

T / FTrue

1 point

3 points

5 points

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