whats the error in this sentence;please try and always do your best

It needs a capital letter, a comma, and a period.

no the sentence is ; please try and always do your best

Yes. That sentence needs a capital letter, a comma, and a period.

The error in the sentence "please try and always do your best" is the word "and".

To identify the error, you need to understand the rules of conjunctions. The conjunction "and" is used to connect two or more similar words, phrases, or clauses. In this sentence, "try" and "always do your best" are not similar in nature. The correct conjunction to use in this context would be "to" or "together with".

To correct the sentence, you can say:
- "Please try to always do your best."
- "Please try, together with always doing your best."

By understanding the rules of conjunctions and applying them correctly, you will be able to identify and fix errors in sentences.