densya aruiha basu de iku.

Japanese often leaves out the subject when it is already understood from context.

So 電車あるいはバスで行く。 can mean:

• I’ll go by train or bus
• We go by train or bus
• (Someone) goes by train or bus

The listener usually figures out who is doing the action from the situation. This is very normal in Japanese.

あるいは means or.

In this sentence, it connects 電車 and バス, so the meaning is by train or bus.

It has a slightly more formal or written feel than some other ways to say or. In everyday conversation, learners will often hear:

• 電車かバスで行く。
• 電車とかバスで行く。 (depending on nuance)

So あるいは is correct, but it can sound a bit more formal or literary.

Here, で marks the means/method of doing something.

So:

• 電車で行く = go by train
• バスで行く = go by bus

In this sentence, 電車あるいはバスで means by train or bus.

This is a very common use of で: it can show the tool, method, or transportation used to do something.

No. Although で can sometimes mean at/in a place where an action happens, that is not its role here.

Compare:

• 駅で待つ = wait at the station
• 電車で行く = go by train

So in your sentence, で is the means of transportation marker, not a location marker.

行く is the plain/dictionary form of the verb to go.

Using the plain form can sound:

• casual
• neutral
• like a dictionary example
• like part of a larger sentence

If you wanted to make it polite, you could say:

• 電車あるいはバスで行きます。

Both are correct; the difference is mainly politeness and style.

Yes. Japanese often omits information that is already known from context, including the destination.

So 電車あるいはバスで行く。 is still fine if the destination is understood.

If you wanted to include the destination, you could say:

• 学校へ電車あるいはバスで行く。 = go to school by train or bus

The place can be left out if it is obvious.

Yes. 電車かバスで行く is a very natural and common way to say this.

Compared with あるいは:

• か is simpler and more common in everyday speech
• あるいは sounds more formal, written, or deliberate

So both are grammatical, but many learners will hear AかB more often in normal conversation.

All of them can relate to or, but they are used differently.

• あるいは: often or / alternatively, somewhat formal or written
• または: also or, often used in formal writing, instructions, forms, legal language
• それとも: used mainly in questions meaning or between choices

Examples:

• 電車あるいはバスで行く。 = go by train or bus
• 住所または氏名を書いてください。 = please write your address or name
• 電車で行きますか、それともバスで行きますか。 = Will you go by train, or by bus?

So それとも would not normally be used in your original sentence, because that sentence is not a question.

Japanese does sometimes use AかBか, but it is not required here.

In a sentence like this, 電車かバスで行く is enough. The single か between the nouns already shows the choice.

Using AかBか often appears when the sentence structure makes the alternatives more explicit, especially in indirect questions or more formal phrasing.

So for this sentence:

• 電車かバスで行く = natural
• 電車あるいはバスで行く = also correct, a bit more formal

No. Standard Japanese is normally written without spaces.

So this would usually be written as:

• 電車あるいはバスで行く。

Spaces are often added in beginner materials to make the structure easier to read. They are a teaching aid, not standard spelling.

Because they come from different kinds of vocabulary.

• 電車 is a native Sino-Japanese word, so it is usually written in kanji.
• バス is a loanword from English bus, so it is written in katakana.

This is very common in Japanese:

• native/Sino-Japanese words → often kanji
• foreign loanwords → often katakana

It usually suggests train or bus as the available means, but the exact nuance depends on context.

It could mean:

• the speaker has not decided yet
• either one is acceptable
• the person generally goes by one of those methods

So the sentence itself does not force only one interpretation. Context tells you whether it means I haven’t decided whether I’ll take the train or the bus or simply I go by train or bus.

Very often, yes. Japanese commonly uses vehicle + で + 行く for transportation.

Examples:

• 車で行く = go by car
• 電車で行く = go by train
• バスで行く = go by bus
• 飛行機で行く = go by plane

So で is the normal particle to show the means of travel in sentences like this.