EF2/3 Compound sentences

FANBOYS
for
He is wearing a sweater, for it is cold. UNUSUAL
It is cold, so he is wearing a sweater. NATURAL
He is wearing a sweater because it is cold. COMPLEX

and
He likes coffee, and she likes coffee, too.
He likes coffee, and he likes tea, too.
He likes coffee and likes tea, too. SIMPLE

but
May likes dogs, but Sarah is afraid of dogs.

or

You can buy a new iphone, or you can get a nice guitar.

yet

It is a sunny day today, yet it is still a bit chilly. UNUSUAL

It is a sunny day today, but it is still a bit chilly. 

NATURAL

so

The little kid was afraid of monsters under his bed, so he went to sleep with his parents.

nor- NOT COMMON

negative negative

She doesn't speak French, nor does she speak German.

She doesn't speak German.

May won't go to the beach, nor will she go on a hike. LOW FREQUENCY

May won't go to the beach or on a hike. SIMPLE

FANBOYS

SOBA