The sentence below is said by a native speaker. It's difficult for me to understand when I should use clitics and when not?

Lo sai che l'italiano è la quarta lingua più studiata in tutto il mondo?

  • 2
    It seems to me that your question is a duplicate of this one: italian.stackexchange.com/q/10862. You can perfectly say "Sai che ..?", by adding the clitic "lo" at the beginning of the sentence you are introducing a right dislocation, as explained in the answer to this other question. – Charo Aug 13 '20 at 20:19

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