היום חזרנו על זמן עבר, זמן הווה וזמן עתיד.

By itself, לחזור often means to return or to come back.

But the full expression לחזור על means to go over, to review, or to repeat something.

So:

• חזרנו = we returned / we went back
• חזרנו על... = we reviewed / we went over...

In this sentence, because it is followed by על and then grammar topics, the meaning is clearly we reviewed.

The ending -נו is the key.

חזרנו is past tense, first person plural:

• חזרתי = I returned / reviewed
• חזרת = you returned / reviewed
• חזרנו = we returned / reviewed

So -נו is the past-tense ending for we.

Because לחזור על is the standard Hebrew expression for to review or to repeat something.

A few examples:

• לחזור על המילים = to review the words
• לחזור על החומר = to review the material
• לחזור על זמן עבר = to review the past tense

So this is something best learned as a set phrase: לחזור על.

Here it means tense.

In everyday Hebrew, זמן usually means time, but in grammar it also means tense.

So:

• זמן עבר = past tense
• זמן הווה = present tense
• זמן עתיד = future tense

The grammar context makes the meaning clear.

These are very common grammar labels, and Hebrew often uses them in this shorter form.

So זמן עבר is a normal way to say past tense, even though English usually says the past tense.

You may also hear:

• זמן העבר
• זמן ההווה
• זמן העתיד

Those are also correct, and they sound a bit more explicitly definite. But the version in your sentence is very natural, especially in teaching.

You can think of it that way, yes.

It works like a compact noun phrase: זמן עבר = literally something like tense of past.

In practice, most learners just memorize these as fixed grammar terms:

• זמן עבר
• זמן הווה
• זמן עתיד

The important thing is that you do not need של here.

Yes, both are possible.

Hebrew word order is fairly flexible. Putting היום first gives it a little more emphasis:

• היום חזרנו... = Today, we reviewed...
• חזרנו היום... = We reviewed today...

Both are natural. The version with היום first is very common.

That is normal Hebrew list structure, just like in English:

• past tense, present tense, and future tense

So Hebrew says:

• זמן עבר, זמן הווה וזמן עתיד

The ו connects the final item: and future tense.

Even though it is written as ו, here it is usually pronounced u-, not ve-.

So וזמן עתיד is commonly pronounced:

u-zman atid

That happens because זמן begins with a consonant cluster in pronunciation (zman), and Hebrew often changes the conjunction ו to u- in that environment.

So the list is typically pronounced:

zman avar, zman hove, u-zman atid

Not always.

You could also say:

היום חזרנו על עבר, הווה ועתיד

and people would understand you.

But repeating זמן makes the sentence clearer and a bit more formal or classroom-like:

היום חזרנו על זמן עבר, זמן הווה וזמן עתיד.

That repeated style is very natural in teaching grammar.

In normal classroom Hebrew, yes. People absolutely say זמן הווה.

More technically, Hebrew present forms are a little different from past and future forms, and some grammar descriptions treat them differently. But for everyday learning and teaching, זמן הווה is the standard term, so the sentence sounds completely normal.

A simple pronunciation guide is:

ha-YOM kha-ZAR-nu al zMAN a-VAR, zMAN ho-VE, u-zMAN a-TID

A few helpful notes:

• ח is a throaty sound, like the ch in Scottish loch or German Bach
• היום is stressed on the second syllable: ha-YOM
• חזרנו is stressed on ZAR
• עבר is a-VAR
• הווה is ho-VE
• עתיד is a-TID