Simple Question Formation
There are 2 kinds of questions that can be asked in English or Spanish. The first is a question that expects a YES or NO answer. In Spanish, to ask a question that will have an answer that starts with either sí or no, you only need to reverse the order of the verb and the subject in a sentence.
For example:
Juan es un estudiante. Juan is a student
To make that a question we simply reverse the positions of the verb and subject. The question becomes:
¿Es Juan un estudiante? Is Juan a student?
Often in English we start a question with DO or DOES, IS or ARE. If the DO or DOES, IS or ARE is not the main verb of the questions, the English word DO or DOES, IS or ARE will be replaced by the upside-down question mark. For example: Does Pedro wear dresses?
Since DOES is not the main verb, it becomes the upside-down question mark. Next we locate the main verb with is WEAR and translate that to Spanish, making sure that we have matched the form with the subject. The verb is then followed by the subject and the rest of the sentence.
Our example above becomes : ¿Lleva Pedro vestidos?
If the DO or DOES, IS or ARE is the ONLY verb in the question or sentence, then it must be translated into Spanish.