conjunctions
irregular past
past progressive
100
My roommate is very organized ___ I am disorganized. (but, so)
but
100
see
saw
100
She lived in Germany. She recorded her first album.
While she was living in Germany, she recorded her first album.
200
Some of the teachers at ACE are native English speakers ___ our teacher is not.
but
200
grow
grew
200
Newton discovered gravity. Newton sat in his garden.
Newton discovered gravity while he was sitting in his garden.
300
Some of the population in Brazil is black ___ many Africans were brought there as slaves.
because
300
begin
began
300
Paul McCartney wrote many songs. Paul McCartney sang with the Beatles.
Paul McCartney wrote many songs while he was singing with the Beatles.
400
Where these mountains formed by an earthquake ___ by other forces?
or
400
become
became
400
He climbed the mountain. He saw many animals.
While he was climbing the mountain, he saw many animals.
500
In order to reduce pollution in urban areas, we must plant trees ___ build "green" buildings
and
500
go
went
500
The stranger hit Mrs. Dunbar. Mrs. Dunbar tied her shoes.
The stranger hit Mrs. Dunbar while she was tying her shoes.
M
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