I just observed Arabic doesn't have present tense "to be" (i.e. am, is, are).
For example, look at this sentence:
اَنا مُعَلِّم (I am a teacher) where اَنا means I and مُعَلِّم means teacher. There isn't a word that means am here. (Ana Moallem)
But surprisingly, they have past tense "to be" (i.e. was and were).
For example:
کانَ جَوُّ بارِد (The air was cold) where کانَ means was, جَو means air, and بارِد means cold. (Kana Javvo Bared).
Even they have future tense "to be" (i.e. will be).
For example:
اَنا سَوفَ أکونُ مُعَلِّم (I will be a teacher) where سَوفَ أکونُ means I will be. (Ana sawfa akoono moallem).
Why don't they have present tense "to be" while they have past tense "to be" and future tense "to be"?