situmon wo kurikaesita.

It is read:

しつもん を くりかえした。
Romanization: shitsumon o kurikaeshita

A couple of useful points:

• 質問 = しつもん
• The particle を is written wo in romanization, but in modern Japanese it is pronounced o
• 繰り返した = くりかえした

を marks the direct object of the verb.

Here, 繰り返した means repeated, so the thing being repeated is 質問. That is why Japanese uses:

質問を繰り返した

So the structure is basically:

• 質問 = question
• を = marks it as the object
• 繰り返した = repeated

In other words, the question is the thing that got repeated.

The dictionary form is 繰り返す.

繰り返した is the plain past form of 繰り返す.

So:

• 繰り返す = to repeat
• 繰り返した = repeated

This is a u-verb. The change is:

• す → した in the plain past

So:

• 話す → 話した
• 消す → 消した
• 繰り返す → 繰り返した

The た ending shows plain past tense.

That means the action already happened.

So 繰り返した tells you that someone repeated the question, not that they repeat it in general.

Compare:

• 質問を繰り返す。 = repeats / will repeat a question
• 質問を繰り返した。 = repeated a question

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

So this sentence does not explicitly say who did it. Depending on the situation, it could mean:

• I repeated the question
• he repeated the question
• she repeated the question
• they repeated the question

Japanese is very comfortable omitting information that the listener can figure out from context.

Usually it suggests that the question was repeated again, often because the first attempt did not get a response or was not understood.

In many contexts, it feels like:

• repeating the same question
• asking the question again

The exact nuance depends on context. Japanese often does not force a strict distinction here.

If you want to focus more specifically on asking again, another natural expression is:

もう一度質問した = asked again / asked one more time

So:

• 質問を繰り返した = repeated the question
• もう一度質問した = asked again

They can be close, but 繰り返した emphasizes repetition.

Here, 質問 is a noun.

It means question or inquiry.

In Japanese, many nouns can combine with する to make a verb. So you can also say:

• 質問する = to ask a question

But in this sentence, the verb is not する. The verb is 繰り返した, and 質問 is the object of that verb.

So the structure is:

• noun: 質問
• object marker: を
• verb: 繰り返した

Yes. The polite version is:

質問を繰り返しました。

The difference is only in style:

• 繰り返した = plain style
• 繰り返しました = polite style

Both mean the same thing, but the polite form is used in more formal situations or when speaking respectfully.

Japanese does not have articles like a, an, or the.

So 質問 by itself can mean:

• a question
• the question
• questions

The exact meaning depends on context.

In this sentence, English might translate it as repeated the question or repeated a question, depending on the situation. Japanese leaves that for the listener to infer.

Yes. 繰り返す is a very common verb and can be used with many kinds of things that happen again.

For example:

• 同じことを繰り返す = repeat the same thing
• 説明を繰り返す = repeat an explanation
• 練習を繰り返す = repeat practice / practice repeatedly
• 失敗を繰り返す = repeat mistakes

So in 質問を繰り返した, it is simply being used with 質問 as the object.

Yes, but it changes the meaning.

• 質問を繰り返した = repeated the question
• 質問を繰り返していた = was repeating the question / had been repeating the question

The 〜ていた form often shows an ongoing action or a repeated state in the past.

So 繰り返した sounds like a completed past action, while 繰り返していた gives more of a continuing or ongoing feeling.