"Ezek nagy folyók."

Translation: These are large rivers.

[pit-tong]

"These rivers are big." would be "Ezek a folyók nagyok."

[Ishana92]

Can this also mean these big rivers?

[Findil]

No, that would be "ezek a nagy folyók".

[Matt5320]

These are large rivers.

[spiraldancing]

Report it, using the "Report a problem" button.

[BrianFisher1]

Could it also be "these rivers are big"?

[lolanoaa]

Why is there no accusative suffix?

[Judit294350]

Because accusative is only used when something is being acted on - if it just "is" it stays nominative

[MatthewCus1]

Because the verb "to be" is implied.

[BetsyLowe]

There is no direct object/accusative in sentences with the verb "to be". "Vannak", 3rd person plural of "to be" is implied here.