それともOr (in a choice question)
それとも introduces the second or a later option in a question that asks someone to choose. It corresponds to “or,” but it normally continues an alternative that has already been mentioned.
Offering a choice
Place それとも immediately before the next option. The first option establishes the choice, and the expression signals that another possible answer is coming.
A polite choice
A casual choice
明日、駅まで電車で行く?それともバスで行く?
Are you going to the station by train tomorrow, or by bus?
Analyzeバスで行こう。
Let's take the bus.
AnalyzeThe two questions are marked by intonation, so neither option needs か.
Inside a larger sentence
The alternatives can form a question inside a larger sentence. In this pattern, か commonly marks each option, while the main sentence says what someone will decide, investigate, or otherwise do about the choice.
会議を月曜日にするか、それとも火曜日にするか、今日中に決めましょう。
Let's decide today whether to hold the meeting on Monday or Tuesday.
AnalyzeAdding another possibility
それとも can begin a follow-up question when the immediately preceding question has already supplied the first possibility. It should not appear without a choice that the listener can recover from the context.
A follow-up option
Questions versus statements
それとも is the natural choice when asking which alternative applies. For alternatives in an ordinary statement, form, or instruction, または is normally more appropriate.
申込書は郵送またはメールで提出してください。
Please submit the application form by post or email.
AnalyzeThis is an instruction, not a choice question, so it uses または.
More examples
店内で召し上がりますか、それともお持ち帰りですか。
Will you be eating here, or is it to go?
Analyze彼が本当に知らなかったのか、それとも知らないふりをしていたのか、私には判断できない。
I can't tell whether he truly didn't know or was pretending not to know.
Analyze責任者は田中さんですか、それとも佐藤さんですか。
Is the person in charge Ms. Tanaka or Mr. Sato?
Analyze予約は今日取り消しますか、それとも日程だけ変更しますか。
Will you cancel the reservation today, or just change the date?
Analyze映画、家で見る?それとも映画館に行く?
Shall we watch a movie at home, or go to the cinema?
Analyzeこの音は外から聞こえるのか、それとも建物の中からなのか、確かめてください。
Please check whether this sound is coming from outside or from inside the building.
Analyze