- ASK PS TO LOOK AT THEB. THEN THE GLASS / IT IS WASHED WITH ADETERGEN...

2. Pratice:

- Ask Ps to look at the

b. Then the glass / it is washed with a

detergent liquid

pictures

c. The glass pieces are completely dried.

- Have Ps read the sentences

d. They are mixed with certain specific

chemicals

e. The mixture is melted untill it becomes a

liquid

f. A long pipe is used, it is dipped into the

Ask them to work in pairs to

liquid, then the liquid is blown into intended

chane these senteces into

passive

shapes.

1 – 4 – 3 - 5 – 2 – 6

II. Use the correct form of the verbs