Final answer:
To say "You [formal] need to study for English class" in Spanish, use "Usted necesita estudiar para la clase de inglés". For the informal form, use "Tú necesitas estudiar para la clase de inglés".
Step-by-step explanation:
For the sentence "You [formal] need to study for English class" in Spanish, you can say "Usted necesita estudiar para la clase de inglés". The word "usted" is the formal form of "you" in Spanish.
For the sentence "You [informal] need to study for English class" in Spanish, you can say "Tú necesitas estudiar para la clase de inglés". "Tú" is the informal form of "you" in Spanish.
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