hěn bàoqiàn, wǒ gāngcái shuō de tài kuài le, nǐ méi tīngqīngchu ba?

In Mandarin, words like 抱歉 often sound more natural with an adverb before them, and 很 is the most common one.

So:

• 抱歉 = sorry / apologetic
• 很抱歉 = sorry / very sorry

Here, 很 does not always need to be translated as a strong very. Sometimes it is just there to make the phrase sound smooth and natural. So 很抱歉 is a very standard, polite way to say I’m sorry.

They are similar, but not identical.

• 抱歉 is a bit more formal or gentle.
• 对不起 is very common and direct.

In this sentence, 很抱歉 fits well because the speaker is apologizing politely for speaking too fast. It sounds a little softer and more refined than 对不起.

刚才 means just now or a moment ago.

In 我刚才说得太快了, it tells you when the action happened:

• 我 = I
• 刚才 = just now
• 说 = speak / say

So the order is:

subject + time + verb phrase

That is very common in Chinese. You could also say 刚才我说得太快了, with 刚才 at the beginning, and that would also be natural.

This is a very important grammar pattern:

verb + 得 + complement

It is used to describe how an action is done.

So:

• 说 = to speak
• 得 = links the verb to the description
• 太快 = too fast

Together:

说得太快 = speak too fast

Here, 得 is not the same as 的 or 地. It specifically introduces a complement after a verb.

A useful comparison:

• 他说中文说得很快。 = He speaks Chinese very fast.
• 他说得很清楚。 = He speaks very clearly.

太...了 often means too... or so... depending on context.

In this sentence:

太快了 = too fast

Because the speaker is apologizing, the meaning is clearly negative: I spoke too fast.

So:

• 太快了 here is not just so fast
• it means faster than was suitable

No, 了 here is not simply a past-tense marker.

In this sentence, 了 helps express the situation as something that has become true or is now being recognized. It is very natural in a sentence like this:

我刚才说得太快了。 = I spoke too fast.

So the sentence is about something that happened, but 了 does not work exactly like English past tense. Chinese does not mark tense the same way English does.

You can think of this 了 as helping show:

• a new realization
• a completed situation
• something relevant right now

Chinese often leaves out objects when they are already understood from context.

So 我刚才说得太快了 can mean:

• I spoke too fast.
• I said it too fast.
• What I said just now was too fast.

The important point here is the manner of speaking, not exactly what was said. Because of that, the object can be omitted naturally.

Because 没 is commonly used to negate:

• past actions
• actions that did not happen
• results that were not achieved

Here the meaning is:

you didn’t hear it clearly

So:

• 没听清楚 = did not hear clearly

Using 不 here would sound wrong in normal Mandarin for this meaning.

A simple rule:

• 不 = usually for habitual actions, general statements, or future refusal
• 没 = usually for past non-occurrence or failed result

听清楚 is a verb + result complement structure.

• 听 = hear / listen
• 清楚 = clear / clearly

Together, 听清楚 means:

• hear clearly
• catch clearly
• understand what was heard clearly

So 你没听清楚 means you didn’t hear clearly or you didn’t catch it clearly.

This is a very common type of structure in Chinese, where the second part shows the result of the action:

• 看懂 = read and understand
• 听懂 = hear and understand
• 写完 = write and finish
• 说清楚 = explain clearly

Here, 吧 softens the sentence and turns it into a guess or a gentle check.

So:

你没听清楚吧？

means something like:

• You didn’t hear it clearly, right?
• You probably didn’t catch that, did you?
• I guess you didn’t hear clearly?

Without 吧, the sentence would sound more direct. With 吧, the speaker sounds less forceful and more considerate.

It is more like checking an assumption.

The speaker is not asking for completely new information. They are guessing the reason and asking the listener to confirm it:

I spoke too fast just now; you didn’t catch it clearly, right?

That is why 吧 is so appropriate here. It makes the question sound tentative and polite.

It is very natural.

The structure is:

• 很抱歉 = apology
• 我刚才说得太快了 = explanation
• 你没听清楚吧？ = polite check

So the flow is:

1. apologize
2. explain the problem
3. check whether that caused difficulty

That is exactly the kind of order you would expect in real spoken Mandarin.

A few natural translations are:

• I’m sorry, I spoke too fast just now. You didn’t catch that, did you?
• Sorry, I was speaking too fast just now. You didn’t hear it clearly, right?
• I’m very sorry, I said that too quickly just now. You didn’t quite catch it, did you?

A very literal translation would be less natural in English, so it is better to translate the meaning smoothly rather than word-for-word.