seinen Kaffee

his coffee

→ sein
phrase Uncommon #19,358
his coffee Possessive phrase; 'seinen' agrees with the noun's gender and case here.
GE: Er trinkt seinen Kaffee jeden Morgen.
EN: He drinks his coffee every morning.

Tom mag seinen Kaffee schwarz.

Tom likes his coffee black.

Er hat Milch in seinen Kaffee getan.

He put milk in his coffee.

Tom gab Milch in seinen Kaffee.

Tom added milk to his coffee.

Er trinkt seinen Kaffee immer schwarz.

He always drinks his coffee black.

Tom trinkt seinen Kaffee immer schwarz und ohne Zucker.

Tom always drinks his coffee black and without sugar.

Er gibt selten Zucker in seinen Kaffee.

He rarely puts sugar in his coffee.

Er mag seinen Kaffee schwarz.

He likes his coffee black.

Er hat seinen Kaffee gerne ohne Zucker.

He likes his coffee without sugar.