Can anyone explain the difference between qual and quale, i thank that qual is used after the essere verb
i think quale=singular, quali=plural, qual= used when next word starts with a vowel
You use qual only in combination with the verb essere in its singular forms, like qual è and qual era. In plural you revert to quali, e.g. quali erano. Quale is the singular form regardless of gender.
Qual/Quale/Quali all mean which/what when you have something to choose from, e.g. Quali di questi piatti vuoi? (Which of these plates do you want?)
When you want to ask about something where there isn't a choice to be made you use Che/Cosa/Che cosa instead, e.g. Che hai detto? (What did you say?)
Qual and Quale mean the same thing. "Qual" escorts vowels, expecially how you said, after the essere verb (precisely the third singular person), example: qual E'; "Quale" or "Quali" are used in all the other cases, when the next word begins with a consonant: quali Sono, quale Hai, and so on. However in italian, it is not a mistake to use "quale è" instead "qual è".
Are there feminine/masculine singular forms of this word, such as "quala" or "quallo"?
Quale is used to indicate people, animals or things. It expresses " What is" when the answer involves a choice, or when request information such as a name, telephone number, or address. Quale is INVARIABLE in gender. Quale di voi ha studiato a Parigi? Quale vuoi conservare di queste due fotografie? In Italian, a question never ends with a proposition. I hope this helps.