You swim. (oznamovací věta)
Ty plaveš.
do - pomocné sloveso, v otázce, nepřekládá se
tedy
Do you swim?
Plaveš?
Do you eat mushrooms?
Jíš houby?
Příklady:
Do you play golf?
Do you like dogs?
Do you have house?
Do you cook?
Do you sleep?
Do you smoke?
Do you eat potatoes?
Do you read newspaper?
Do you study English?
Do you study biology?
Do you work every day?