Would the sentence I were rich would buy a be grammatically correct?

No, the sentence "I were rich would buy a" is not grammatically correct. Here's why:

* Incorrect Verb Tense: "Were" is the past subjunctive form of "to be." While it's used in hypothetical situations, it needs a corresponding clause with a main verb to be grammatically correct.

* Incomplete Sentence: The sentence is missing the object of the verb "buy." We need to know what the speaker would buy.

Here's how to correct the sentence:

Option 1 (If you're talking about a hypothetical situation):

* "If I were rich, I would buy a [object]."

Option 2 (If you're talking about a wish):

* "I wish I were rich so I could buy a [object]."

Option 3 (If you're making a statement about what you would do):

* "If I were rich, I'd buy a [object]."