EF5/6 Compound sentences

COMPOUND SENTENCES

It is cold, so Mary is wearing a scarf.

SIMPLE SENTENCESIt is cold. Mary is wearing a scarf.

It is cold, so Mary is wearing a scarf.

FANBOYS
for and nor but or yet so
Mary is wearing a sweater, for it is cold today. XXX UNUSUAL
Mary is wearing a sweater because it is cold today. COMPLEX
Sarah doesn't speak French, nor does she speak German. XXX UNUSUAL
Sarah doesn't speak French or German. NATURAL SOUNDING

so or but and
SOBA