This question already has an answer here:
EDIT - Tony adds this interpretation, which hopefully the OP will accept by removing this line.
If one of my pawns captures a Rook (which is on the 8th rank) can I promote that pawn to a Queen in the same move? In other words, can I capture-and-promote? What if I already have a queen? What if I capture a Knight, instead of a Rook? Can I do it then?