There are two ways to pass the ball between players: ground pass and lob pass.

Ground pass

Press S

To make a ground pass, press S and use to indicate direction in which you want to kick the ball. Receiving player will be selected automatically.

Lob pass

Hold A

To make a lob pass, hold A and use to indicate direction in which you want to kick the ball. The longer you hold, the further the ball will go.