Možeš li ponovno objasniti ovaj zadatak?

Možeš means you can or you are able to. It is the 2nd person singular form of moći.

Li is a question particle used to turn this into a yes/no question.

So Možeš li...? is basically Can you...?

In standard Croatian, li usually comes right after the first stressed word, and in this kind of sentence that is normally the conjugated verb.

So:

Možeš li ponovno objasniti ovaj zadatak?
is the normal pattern.

This verb + li structure is very common in Croatian yes/no questions.

Croatian often leaves out subject pronouns because the verb ending already shows who the subject is.

Here, možeš already tells you the subject is you singular.

You could add ti for emphasis:

Možeš li ti ponovno objasniti ovaj zadatak?

But normally it is not necessary.

Because after the modal verb moći (can, be able to), Croatian normally uses an infinitive.

So:

možeš objasniti = you can explain

This is similar to English can explain, where explain also stays in its base form.

This is a question of aspect.

Objasniti is the perfective form, and it suggests explaining something as one complete action. That is the natural choice here, because the speaker wants one full explanation of the task.

Objašnjavati is imperfective, and it would suggest repeated, ongoing, or habitual explaining. In this sentence, that would sound less natural.

Ponovno means again.

You will also hear:

• opet
• ponovo

All are understood, but ponovno is very neutral and standard.

So these are all possible:

Možeš li ponovno objasniti ovaj zadatak?
Možeš li opet objasniti ovaj zadatak?

Because ovaj zadatak is the direct object of objasniti, so it is in the accusative case.

However, with masculine inanimate nouns in Croatian, the accusative singular is usually the same as the nominative singular.

So:

• nominative: ovaj zadatak
• accusative: ovaj zadatak

That is why the form does not visibly change here.

Zadatak can mean several things depending on context, such as:

• task
• exercise
• problem
• assignment

In a classroom context, it often means exercise or problem.

Yes, Croatian word order is fairly flexible, but some versions sound more natural than others.

The original sentence is very natural:

Možeš li ponovno objasniti ovaj zadatak?

You could also say:

Možeš li ovaj zadatak ponovno objasniti?

That is also natural. The meaning stays basically the same, but the emphasis shifts slightly toward ovaj zadatak.

The position of li is much less flexible than the position of ponovno.

Use možete instead of možeš.

So the formal or plural version is:

Možete li ponovno objasniti ovaj zadatak?

If you want to sound even more polite, you can add molim vas:

Možete li, molim vas, ponovno objasniti ovaj zadatak?

Yes, people will understand it, and you may hear that structure in everyday speech or in neighboring standard varieties.

However, in standard Croatian, Možeš li...? is generally preferred over Da li možeš...?

So for a learner aiming at standard Croatian, Možeš li ponovno objasniti ovaj zadatak? is the better model.