"Do you study a lot?"
Translation:¿Tú estudias mucho?
The sign next to..tú..Is a spanish question mark.. .this always appears at the beginning of a question and u can get it by holding a little longer on the regular question mark sign
So if I ask a woman if she studies a lot I don't ask her "¿Estudias mucha?"
No, because mucho here is an adverb and does not change with gender. It is not modifying a noun (let alone one that isn't even in the sentence!) - it is dealing with the amount of studying. But when it is used as an adjective it does change to match gender and number: mucho dinero, mucha agua, muchas gracias.