What kind of energy source do you see in this song?

Positive

Comparative

Superlative

cold colder coldesthot hotter hottestbig bigger biggestwarm warmer warmestlarge larger largestexpensive

more expensive

the most expensive

Positive

Comparative

Superlative

good better bestbad worse worstlittle less lestmany more most

Here are some irregular adjectives.

Comparative form (a) Short adjectives With short adjectives, we make

comparative form by adding –er to the stem.

The cheaper plates are over therecomparative

(b) Long adjectivesWith long adjectives, we put more before the adjective.

It’s more expensive to travel on Friday

It’s more dangerous on the southern slope

comparative

comparative

Superlative form(a)Short adjectivesFor the superlative form, we add –est to the stem. Rutland was the smallest county in

Britain.Superlative

(b)Long adjectivesWith long adjectives we put most before the adjective.

Who is the most beautiful girl in the world?

Rory Underwood is England’s most successful rugby playerSuperlative

Superlative

ListeningListening

SpeakingSpeaking WritingWriting

ReadingReading

Activity 1Activity 1Listen “The energy Listen “The energy from plants” and from plants” and circle T (true) or F circle T (true) or F

(false). For the (false). For the sentences you sentences you

marked false, give marked false, give the correct the correct

information.information.

The scientists have The scientists have never begun to never begun to investigate fuel investigate fuel

producing plants.producing plants.The energy from plants The energy from plants

is renewable.is renewable.

The energy which green The energy which green plants supply is useless.plants supply is useless.

Scientists have always Scientists have always been interested in been interested in

plants which produce plants which produce food like grain or fruit.food like grain or fruit.Water hyacinth is fast-Water hyacinth is fast-growing weed which growing weed which

grows in brackish grows in brackish water.water.

1

2

1

2

Activity 2Activity 2Read the text Read the text

and answer the and answer the questionsquestions.. What What

does the does the reference word reference word

refer to?refer to?

1.It’s not difficult 1.It’s not difficult to see…..(line 2)to see…..(line 2)

Green Green plantsplants

2. It is renewable. 2. It is renewable. (line 5)(line 5)

Green Green plantsplants

3. They are looking 3. They are looking at quick-at quick-

growing….. (line growing….. (line 18)18)

ScientistsScientists

4. It costs nothing 4. It costs nothing to produce. (line 4)to produce. (line 4)

Green Green plantsplants

5. But, most 5. But, most important of all.important of all.

(line 4)(line 4)

PlantsPlants

Activity 3Activity 3Think of energy Think of energy

source from source from plants that you plants that you

know and present know and present in front of the in front of the

class.class.

ExampleExample Corn is raw Corn is raw material to produce material to produce

ethanol. It’s not ethanol. It’s not expensive. Moreover, expensive. Moreover,

we use corn cob to we use corn cob to produce electricity produce electricity

energyenergy..

Activity 4Complete

each sentence with a

comparison.

1. Scientists have helped framers to produce _______

and ________ crops from these plants. (large)

larger larger

2. Breeding new plants whish produce ______

crops and which resist disease ______ . (heavy,

good)

heavier

better

3. Giant kept is one of the world’s

______ -growing plants. (fast)

fastest

4. It was never a pleasant beach, but the oil

made it _______. (dirty)dirtier

5. Today we use ______ electric energy than energy from plants.

(many)

more

6. Energy from coal is the ____________(expensive)most expensive

7. Water hyacinth is a ______ growing in

fresh water than sugar cane. (fast)

faster

8. The energy from green plant the __________

of all energy from plant. (important)

most important