or
Noun / Informal Sentence +
This formation acts as a conjunction to present two possible choices, actions, or events, translating to or. When used to mean or, the particle は is almost always included as
Noun 1 (+ か) +
Links two nouns to present them as two possible options. Adding the particle か after the first noun is optional but common.
水か、
Please drink water or tea.
月曜日
I will contact you on Monday or Tuesday.
Informal Sentence 1 (+ か) +
Links two clauses or actions. The first sentence must be in the informal form and is usually followed by the particle か before introducing the second sentence.
歩いて行くか、
I will go on foot, or I will go by bicycle.
新しい車を買うか、
I will buy a new car, or repair the old car.
Unlike the number range formation, using just