Arabic does have ‘to be’. But just not in the same way as English.
It has akoon اكون in present. sakoon ساكون in future. And kana كان in past. to be, will be, and was, respectively.
What people mean is that you can say I am Ricky by saying ‘Ana Ricky’. Without any verb (I/me Ricky). But if you say ‘I want to be Ricky’. You have to use the verb for ‘to be’. Urid an akoon Ricky أريد ان أكون ريكي. What this means is that there is no copula in Arabic (same in Hebrew). Unless you count the occassions in Hebrew or Arabic when pronouns are used as unofficial copulas. Which is the semitic equivalent of this phenomenon, to many linguists.
ריקי הוא אנרכיסטRicky (he is) an anarchist. The same as Ricky is an anarchist. Roughly, Ricky hu anarkist.
ريكي هو ميزسي Ricky (he is) a Misesian. The same as Ricky is a Misesian. Transliteration: Ricky hua Mizesi.
But the verb ‘to be’ is there. Which might mean that a verb is more universal than copula (what links subject and predicate). When you think of ‘to be’ in this way, it seems more unavoidable. You must see them as three tenses to understand the verb. And a variation of a single mental idea of being. It’s not even about the verb existing, but some mental idea being represented arbitrarily by a sign. And the idea exists and the sign exists. Ergo, the verb exists.
The rules people usually say about English or maybe all languages are that:
All sentences will have some either explicit or implicit subject and predicate.
And all languages have some categories like a verb.
Obviously you can point to sentences like “No!” or “What?” as complete sentences without verbs. You don’t need Shakespeare or funky phrases. (You also have to be careful not to compare apples and oranges; or specific rules to general ones. Or language to language. You must speak about the same thing, ceterus peribus).
What linguists would do is say that these are short for longer sentences, complete with subjects and predicates. Which we also store mentally but we can remove some of it because it is still understandable. The same way we often delete things like relative pronouns (I told her she was fat/I told her that she was fat).
“No you cannot do [something]!” or “What did you say?” In this case, there are no sentences where you can avoid filling in subject and predicate somehow if you so wished. There is no way to shorten a sentence so much that it is not shorthand for something more complete.
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