Uni 7 ENVIRONMENTAL
PROTECTION
t
LESSON 3: A CLOSER LOOK 2

1

WARM-UP

ADVERB
CLAUSES OF
TIME

1. I always take a bath before I go to bed.
2. Will you wait here until I am ready?
3. I was not at home when he came to
see me.
4. Do not disturb me when I am busy
with my work.
5. As soon as she finished that project,
she started working on the next.
6. After I have finished my work, I will
accompany you to the park.

PRESENTATION

Complex sentences with
adverb clauses of time
– A complex sentence contains one independent clause and at least one
dependent clause.
Example:
The roads were slippery
when it rained.
independent clause
dependent clause
– An adverb clause is a dependent clause.
– An adverb clause of time shows when something happens. It is usually
introduced by time connectors: before, after, when, while, till / until, as soon
as, …

PRESENTATION

Complex sentences with adverb clauses of time
– A complex sentence contains one independent clause and at least
one dependent clause.
Example:
The roads were slippery
when it rained.
independent clause
dependent clause
– An adverb clause is a dependent clause.
– An adverb clause of time shows when something happens. It is
usually introduced by time connectors: before, after, when, while, till /
until, as soon as, …

PRESENTATION

1

Read the sentences and write I.C if the underlined clause is an independent clause
or D.C if it is a dependent clause

I.C 1. I'll wait for you here until you get back.
D.C 2. Make sure you lock the door when you go out.
I.C 3. You must get a permit before you build a
campfire at a national park.
D.C 4. Don't use too much water while you are
having a shower.
D.C 5. As soon as my friends come, we will pick up
rubbish on the beach.

PRACTICE

2

Choose A, B, or C to complete each sentence.

1. I was not at home ______ he came to see me yesterday.
A. when
B. until
C. as soon as
2. We called the forest guard unit ______ we saw the bush fire.
A. as soon as
B. while
C. until
3. I went straight to the gym ______ I left home.
A. while
B. before
C. after
4. You can stay with us ______ you find a suitable place to stay.
A. as soon as
B. before
C. until
5. We cleaned up everything at the campsite ______ we left.
A. until
B. before
C. while

PRACTICE

3 Match the clauses in the two columns to form complex sentences.

PRACTICE

4 Combine each pair of sentences, using the conjunction in brackets.
1. I arrive at the station. I will call you right after. (as soon as)
________________________________________________________
I will call you as soon as I arrive at the station.
________________________________________________________
As soon as I arrive at the station, I will call you.
2. Many Vietnamese women wear conical hats. They work in the field. (when)
___________________________________________________________
Many Vietnamese women wear conical hats when they work in the field.
3. My father taught me how to use the computer. Then he bought one for me.
(before)
My father taught me how to use the computer before he bought one for me.
_______________________________________________________________
_______________________________________________________________
Before my father bought me a computer, he taught me how to use it.

PRACTICE

4 Combine each pair of sentences, using the conjunction in brackets.
4. Nick is reading a novel. Jack is reading a cartoon. (while)
________________________________________________________
Nick is reading a novel while Jack is reading a cartoon.
________________________________________________________
While Nick is reading a novel, Jack is reading a cartoon.
5. The tornado hit. There were only a few houses left standing. (after)
________________________________________________________
After the tornado hit, there were only a few houses left standing.
________________________________________________________
There were only a few houses left standing after the tornado hit.

PRODUCTION

5

Matching game:

Work in two groups, A and B.
Group A:
write main clauses
Group B:
write adverb
clauses of time

PRODUCTION 5

Work in two groups, A and B.

-Don't use the cell phone while you are driving.
-As I was walking down the street, I saw James
driving a Porsche.
-He went to work after he fed the cats.
-He went abroad after he finished his studies.
-Bring me some water before you go.
-They were told to wait till the signal was given.
-I will wait here until you arrive.
-As soon as he heard the news, he called me.

CONSOLIDATION

1 Wrap-up
What have we learnt in this lesson?
 use the Complex sentences with
adverb clauses of time;

CONSOLIDATION

2 Homework
Do exercise in the workbook.

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