*REVISION :
1.Why have women joined together to create the so-called “ women’s liberation movement “ ?

2. What were the causes of the liberation of women ?

3. Could women delay having children or avoid having them altogether ? Why ?
 Because birth-control was developed , women could delay having children or avoid having them altogether .
 Because of the development of birth control , women could delay having children or avoid havingthem altogether
 Because birth-control was developed ,
women could delay having children or avoid having them altogether .
 Because of the development of birth-control , women could delay having children or avoid havingthem altogether .
Clause of reason
Comparison of BECAUSE and BECAUSE OF
Grammar :
 Because birth-control was developed ,
women could delay having children or avoid having them altogether .
 Because of the development of birth control , women could delay having children or avoid havingthem altogether .
Clause of reason
Phrase of reason
Comparison of BECAUSE and BECAUSE OF
Grammar :
 Because birth-control was developed ,
women could delay having children or avoid having them altogether .
Clause of reason
Because + S + V

( Conjunction )
Comparison of BECAUSE and BECAUSE OF
Grammar :
 Because of the development of birth control , women could delay having children or avoid havingthem altogether .
Phrase of reason
Because of + noun (phrase ) / gerund (phrase )
(Prepositional phrase)
Comparison of BECAUSE and BECAUSE OF
Grammar :
Because of + noun (phrase ) / gerund (phrase )
(Prepositional phrase)
Because + S + V

( Conjunction )
Because there is the women’s liberation , women can take part in social activities . 
Comparison of BECAUSE and BECAUSE OF
Grammar :
Because of the women’s liberation , women can take part in social activities . 
Because + there + be + noun phrase
Because of + noun phrase
Comparison of BECAUSE and BECAUSE OF
Grammar :
Last week he couldn’t go to work.
Comparison of BECAUSE and BECAUSE OF
Grammar :
He couldn’t go to work because he was sick.
 He couldn’t go to work because of his sickness .
Because + S ( pronoun ) + be + adj.
Because of + possessive adj. + noun
Comparison of BECAUSE and BECAUSE OF
Grammar :
The flights were cancelled .
Comparison of BECAUSE and BECAUSE OF
Grammar :
`
a)The flights were cancelled because the fog was thick.
The flights were cancelled because of the thick fog.
Because + S (the/ his /... + noun ) + be + adj.
Because of + (the/ his /... ) + adj . + noun
(the / his /...) + noun’s + noun
b)The car crashed because the driver was careless.
The car crashed because of the driver‘s carelessness.

Comparison of BECAUSE and BECAUSE OF
Grammar :
He felt tired .
Comparison of BECAUSE and BECAUSE OF
Grammar :
a)Because he worked hard , he felt tired.  
Because + S( noun / pronoun ) + V. + adv.
b)She was angry because her friend came late.

his working hard,  Because of he felt tired.
his hard work,
 She was angry because of her friend’s coming late.
V-ing + adv.
Because of + noun’s/poss. adj. +
adj. + noun
Because + S( noun / pronoun ) + V. + adv. Because of + noun’s/poss. adj. +
Because + S (the/ his...+ noun) + be + adj.
Because of + (the/ his... ) + adj + noun
(the / his...) + noun’s + noun
Because + there + be + noun phrase
Because of + noun phrase
Because + S ( pronoun ) + be + adj
Because of + possessive adj. + noun
Because + S + V
( Conjunction )
Because of + noun (phrase ) / gerund (phrase )
(Prepositional phrase)
V-ing + adv.
Adj + noun
Grammar :
Comparison of BECAUSE and BECAUSE OF
Exercise 1 : Use BECAUSE or BECAUSE OF to match A and B to make meaningful sentences .
1. I can?t answer the question because it is difficult .
5. He left school because his life was hard .
4. We stopped our car because the traffic lights turned red .
3. Ann didn?t go to the circus because of her bad cold .
2. He couldn?t read the letter because of the dark 
1. I couldn?t sleep because the weather was hot . 2. Because she is careful , she didn?t make any mistakes in her answers . 3. Because my friend was absent , I have to copy the lesson for him . 4. He couldn?t return home because he lost all of his money . 5. Because of the rain , I stayed at home . 6. Because of a traffic jam , I couldn?t arrive on time .
Exercise2 : Rewrite the following sentences using BECAUSE or BECAUSE OF
? I couldn?t sleep because of the hot weather .
? Because of her carefulness , she didn?t make any mistakes in her answers .
? Because of my friend?s absence , I have to copy the lesson
for him .
? He couldn?t return home because of losing all of his money .
? Because it rained , I stayed at home .
? Because there was a traffic jam , I couldn?t arrive on time .
Exercise 3 : Complete each conversation by using ?BECAUSE + clause ? or ? Because of + noun phrase / gerund phrase ?
A : Do you like living in a big city ?
B : Yes , I do. (/ No , I don?t .)
A : Why ? (/ Why not ? )
B : I like (/ I don?t like ) living in a big city because (/ because of ) ............................... What about you ?
A : I like ( / I don?t like ) living in a big city because ( / because of ).....................................
2.C: Why do you study English very hard ?
D: I study English very hard because (/ because of) ....
............. .
3.E : Do you know the reason why An didn?t go to the fair
last night ?
F : Oh , she didn?t go to the fair last night because ( /
because of ) ......................... .

4.G : Which subjects are you interested in ?
H : I am interested in ................... because ( / because of )
................. . And you ?
G : I am absorbed in .................... because ( / because of )
............................. .