which

US /wɪtʃ/
UK /wɪtʃ/
"which" picture
1.

welcher, welche, welches

asking for information specifying one or more people or things from a definite set

:
Which book do you want?
Welches Buch möchtest du?
Which way should we go?
Welchen Weg sollen wir gehen?
1.

welcher, welche, welches

referring to a choice between two or more alternatives

:
Which of these colors do you prefer?
Welche dieser Farben bevorzugst du?
He asked which way was best.
Er fragte, welcher Weg der beste sei.
2.

der, die, das

used to introduce a non-restrictive relative clause

:
The car, which was red, sped down the road.
Das Auto, das rot war, raste die Straße entlang.
He gave me a gift, which was very kind of him.
Er gab mir ein Geschenk, was sehr nett von ihm war.