eki de kippu wo nimai kaimasita.

で marks the place where an action happens.

In this sentence, 駅で means at the station as the location of the action buying.

A helpful contrast:

• で = where an action takes place
  
  • 駅で買いました = bought it at the station
• に = destination, time, or existence in many cases
  
  • 駅に行きます = go to the station

So here, because the speaker is doing the action of buying at the station, で is the natural particle.

を marks the direct object of the verb—the thing that the action is done to.

Here, the action is buying, and the thing being bought is 切符 (ticket(s)), so:

• 切符を買いました = bought ticket(s)

In other words, 切符 is what was bought, so it takes を.

二枚 means two flat objects and is being used as a counter.

Japanese usually uses counters when counting things. For tickets, 枚 is common because tickets are flat, thin items.

So:

• 二 = two
• 枚 = counter for flat objects
• 二枚 = two tickets / two sheets / two flat items

In this sentence, 二枚 tells you how many tickets were bought.

In Japanese, counters often come after the noun they describe, especially in everyday sentences.

So this pattern is very common:

• 切符を二枚買いました

This literally feels like:

• tickets + two + bought

Japanese also allows other patterns in some cases, such as:

• 切符二枚を買いました
• 二枚の切符を買いました

But 切符を二枚買いました is extremely natural and very common in conversation.

So the placement may feel unusual from an English perspective, but it is standard Japanese word order.

Yes. Even though 二枚 comes after 切符を, it still tells you the quantity of 切符.

So:

• 切符を二枚買いました = bought two tickets

This is a normal Japanese pattern:

• noun + particle + counter + verb

The counter is still understood as referring to that noun.

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

So instead of saying:

• 私は駅で切符を二枚買いました

Japanese often simply says:

• 駅で切符を二枚買いました

The subject I is understood if the context makes it obvious.

This is very common in Japanese. Subjects, objects, and other information are often omitted when they do not need to be repeated.

買いました is the polite past form of the verb 買う (to buy).

Breakdown:

• 買う = dictionary form / plain present
• 買います = polite non-past
• 買いました = polite past

So 買いました means bought in a polite style.

This tells you two things:

1. The action happened in the past
2. The sentence is in polite speech

Japanese sentences normally place the verb at the end.

That means a basic sentence pattern is often:

• [place] [object] [quantity] [verb]

So:

• 駅で = at the station
• 切符を = tickets
• 二枚 = two
• 買いました = bought

This verb-final structure is one of the most important differences from English.

By itself, 切符 does not show singular or plural the way English nouns often do.

Japanese nouns usually do not change form for plural.

The number is shown by context or by a counter. In this sentence, 二枚 makes it clear that there were two tickets.

So:

• 切符 alone could mean ticket or tickets
• 切符を二枚 clearly means two tickets

That word order is not the most natural.

The most natural version is:

• 駅で切符を二枚買いました

Why? Because 二枚 functions as a counter phrase tied to 切符, and the common pattern is:

• noun + を + counter + verb

You may also see:

• 二枚の切符を買いました = bought two tickets

But 駅で二枚切符を買いました sounds awkward and is generally not the standard way to say it.

Both can mean bought two tickets, but they feel slightly different in structure.

• 切符を二枚買いました
  Very common, natural, and conversational.
  The noun comes first, then the counter.

• 二枚の切符を買いました
  More directly like two tickets as a noun phrase.
  This can sound a little more descriptive or structured.

Both are correct, but 切符を二枚買いました is especially common in everyday Japanese.

枚 is a counter for flat, thin objects.

Common things counted with 枚 include:

• tickets
• paper
• shirts
• plates
• stamps

Examples:

• 紙を一枚 = one sheet of paper
• シャツを三枚 = three shirts
• 切符を二枚 = two tickets

So in this sentence, 枚 is used because a ticket is treated as a flat item.

It is polite, but not especially formal.

Because it ends in 買いました, it is appropriate for:

• normal polite conversation
• speaking to strangers
• speaking to teachers, coworkers, or customers in many situations

A plain-style version would be:

• 駅で切符を二枚買った

That is less polite and would be used with friends, family, or in casual narration.

So the original sentence is best described as polite everyday Japanese.