Separation of Lanthanides/ Lanthanides and Actinides
Active & passive
1.
2. Active and Passive voice:
When we use the passive, we often
want to focus on what happened and
not on who did it.
The object of the active sentence
becomes the subject of the passive
sentence, and we add the verb “ to
be” in the same tense as the active
sentence.
3. The main objectives:
* To identify the passive forms.
* To change active sentences into the passive.
* To use the passive sentences.
4. Note the following examples:
Alexander Graham Bell invented the telephone.
ACTIVE:
subject verb object
PASSIVE: The telephone was invented by Alexander Graham Bell.
Simple tenses passive:
Verbs to be + Past participle
is
are
was
were
5. The glassmaker fixed the
Broken window.
The broken window was
fixed by the glass-maker.
ACTIVE
PASSIVE
8. The workers were
cutting down the
trees to build new
roads.
The trees were
being cut down
to build new
roads.
ACTIVE
PASSIVE
9. Ali is repairing the car.
The car is being repaired.
ACTIVE
PASSIVE
10. Perfect tenses
passive:
We use been + past participle after have, has, and had.
Study the following examples:
ACTIVE: They have increased the bus fares again.
PASSIVE: The bus fares have been increased again.
The rule:
has
have
had
+ been+ Past participle
11. A number of political
prisoners have been
released.
The government has
released a number of
political prisoners.
ACTIVE
PASSIVE
12. The flood had destroyed
many houses.
Many houses had
been damaged by
The flood.
ACTIVE
PASSIVE
13. The future and modal verbs passive
We use be + past participle after will, be going to, can, must, have to, should, etc.
Study the following examples:
ACTIVE: We are going to require renewable energy.
PASSIVE: Renewable energy is going to be required.
The Rule:
be going to
Will
modal
+ be + Past participle
14. Salam will bake the bread.
The bread will be baked
by Salam.
ACTIVE
PASSIVE
