Amy and I have been friends SINCE we were 5.
My brother is great at Maths, ____________ he doesn't like helping me with my homework.
My brother is great at Maths, BUT he doesn't like helping me with my homework.
WHEN / BECAUSE he heard about my birthday party, he wanted to come.
WHEN he heard about my birthday party, he wanted to come.
She has chatted with her friends ___________ 2 hours.
She has chatted with her friends FOR 2 hours.
We don't leave the classroom WHEN / UNTIL the teacher tells us to do so.
We don't leave the classroom UNTIL the teacher tells us to do so.
I hardly ever meet my grandparents ___________ they live in Salta.
I hardly ever meet my grandparents BECAUSE they live in Salta.
Most of my family live in Argentina, AND / ALTHOUGH my uncle lives in the US.
Most of my family live in Argentina, ALTHOUGH my uncle lives in the US.
____________ my dad was cooking dinner, my mom washed the dishes.
WHILE my dad was cooking dinner, my mom washed the dishes.