Se è vero che ci sei in Italian means "If it's true that you are there" in English.
Che in Italian means "that" in English.
"What" in English is Che?, Che cosa? or Cosa? in Italian.
"What was that?" in English is Che cosa era? in Italian.
Che bono che sei! in Italian means "How attractive you are!" in English.
Che cosa
"Yum!" in English is Che buono! in Italian.
"What will be, will be!" in English is Sarà quel che sarà! in Italian.
"It is what it is!" in English is È quello che è! in Italian.
"Of course not!" in English is Certo che no! in Italian.
"How pretty!" in English is Che carina! in Italian.
"What is...?" in English is Cos'è...? in Italian.
"Who" in English is chi as a question and che as a statement in Italian.