jīntiān zǎoshang wǒ liùdiǎnbàn jiù xǐng le.

They do, but they give different levels of time information:

• 今天 = today
• 早上 = morning

Together, 今天早上 means this morning / today in the morning.

This is very natural in Chinese. It works like stacking time expressions from bigger time to smaller time:

• 今天 → day
• 早上 → part of the day
• 六点半 → exact clock time

So the sentence narrows the time step by step.

Chinese usually places time expressions before the verb, often from larger time frame to smaller time frame.

So this sentence is organized like this:

• 今天早上 = general time
• 我 = subject
• 六点半 = specific time
• 就 = already / as early as
• 醒了 = woke up

A helpful pattern is:

[general time] + [subject] + [specific time] + [adverb] + [verb]

So this sentence sounds very natural.

You could also say:

我今天早上六点半就醒了。

That is also correct and common.

Both mean 6:30, but 六点半 is much more natural in everyday speech.

• 六点半 = half past six / 6:30
• 六点三十分 = 6:30 in a more formal, precise, or written style

In normal conversation, Chinese speakers usually prefer:

• 一点半 = 1:30
• 三点半 = 3:30
• 六点半 = 6:30

So in this sentence, 六点半 sounds very natural.

In this sentence, 就 shows that something happened earlier than expected, sooner than usual, or as early as that time.

So:

• 我六点半醒了 = I woke up at 6:30.
• 我六点半就醒了 = I woke up as early as 6:30 / I was already awake at 6:30.

The sentence without 就 is more neutral.
The sentence with 就 adds a feeling like:

• That was early
• Earlier than normal
• Soon already

So 就 is not just about time; it adds the speaker’s attitude toward that time.

Because 醒 and 起床 are not the same action.

• 醒 = to wake up / become awake
• 起床 = to get out of bed

So:

• 六点半就醒了 = I woke up at 6:30.
• 六点半就起床了 = I got out of bed at 6:30.

In real life, you can wake up and still stay in bed for a while. Chinese makes that distinction clearly.

The 了 here marks a change of state or a completed event.

Before that moment, the person was asleep.
After that moment, the person was awake.

So 醒了 means woke up / became awake.

This is a very common use of 了 with verbs that describe a change:

• 到了 = arrived
• 病了 = became sick
• 懂了 = understood / came to understand
• 醒了 = woke up

Without 了, 醒 by itself can sound incomplete or more like a dictionary form.

Yes, sometimes, but the nuance is a little different.

• 醒了 focuses on the change of state: woke up
• 醒来 often emphasizes the action of coming awake

You may hear:

• 我六点半就醒了。
• 我今天早上六点半就醒来了。
• 我今天早上六点半就醒来。 → this one is not correct by itself in this context

In everyday speech, 醒了 is very common and natural here.

Also, 醒来 often appears in patterns like:

• 我早上醒来的时候... = When I woke up in the morning...
• 他终于醒来了。 = He finally woke up.

So for this sentence, 醒了 is the simplest and most natural choice.

Yes, it is a very common time expression meaning this morning.

You can think of it as one chunk:

• 今天早上 = this morning
• 昨天早上 = yesterday morning
• 明天早上 = tomorrow morning

Chinese often builds time phrases this way:

day word + part of day

For example:

• 今天下午 = this afternoon
• 今天晚上 = tonight / this evening
• 昨天晚上 = last night

So it is very useful to learn 今天早上 as a set phrase.

Chinese usually does not need a preposition like at before a clock time.

English says:

• at 6:30

Chinese simply says:

• 六点半

So Chinese time expressions often work directly in the sentence without extra words like at, on, or in when the meaning is clear.

That is why:

• 今天早上我六点半就醒了 is natural
• You do not need something before 六点半

Yes. That is also completely natural.

Both of these are correct:

• 今天早上我六点半就醒了。
• 我今天早上六点半就醒了。

The difference is mostly about what is being highlighted first:

• 今天早上... puts the time in front right away
• 我... starts with the subject

Chinese is fairly flexible with time expressions, as long as they appear before the main verb and the sentence remains clear.

Yes. It is usually pronounced zǎoshang, with:

• 早 = third tone
• 上 = often a neutral tone here

So it sounds like:

• zǎoshang

This is very common in everyday speech.

The same thing happens in many time words:

• 早上 = zǎoshang
• 晚上 = wǎnshang

Learners often want to pronounce 上 with a full fourth tone because the dictionary form is shàng, but in this word it is commonly light and neutral.

Yes, depending on context, there can be a slight overlap.

Strictly speaking, 醒了 means woke up or became awake.
But because of 就, the sentence can also give the feeling that by 6:30, I was already awake, especially in conversation.

So the main idea is:

• the waking happened at that time
• and that time felt early

If you want to focus more clearly on the state of already being awake, Chinese might use other wording. But in normal speech, 六点半就醒了 naturally conveys both:

• I woke up at 6:30
• and that was already early