mise ga shimaru mae ni, pan o kaimasu

I buy bread before the store closes.

Breakdown of mise ga shimaru mae ni, pan o kaimasu

• を: direct object particle
• が: subject particle
• パン: bread
• に: time particle

Questions & Answers about mise ga shimaru mae ni, pan o kaimasu

Why is it 店が and not 店は here?

Because が marks the subject of the smaller clause 店が閉まる (the shop closes).

In this sentence, 店が閉まる前に means before the shop closes. Inside that clause, 店 is specifically the thing doing the action 閉まる.

Using は would shift the nuance and make 店 more of a topic, which is less natural here unless you are contrasting it with something else.

So:

• 店が閉まる前に = before the shop closes
• 店は閉まる前に... would sound like you are setting the shop up as a topic in a different way

Why is 閉まる in the plain form instead of 閉まります?

This is a very common pattern in Japanese.

When a verb comes before a noun or before expressions like 前に, it usually appears in the plain form, not the polite form.

Here, 閉まる前に literally works like:

• 閉まる = closes / will close
• 前 = before
• に = at / before

So the structure is:

• verb (plain form) + 前に

Examples:

• 寝る前に = before sleeping / before I go to bed
• 食べる前に = before eating
• 店が閉まる前に = before the shop closes

Even though the whole sentence ends politely with 買います, the verb inside this kind of clause stays plain.