The verb hacer is irregular in the present tense. You must memorize it.

HACER (to make, to do)
 

Remember that the word ‘do’ in English questions such as ‘Do you speak Spanish?’ is not translated into Spanish: ¿Habla usted español? The verb hacer is used to ask the question ¿Qué hace usted? (‘What are you doing?’), but the answer to this question generally involves a verb other than hacer: Leo un libro (‘I'm reading a book’), etc. Answer with hacer only when you are actually making something: Hago un pastel (‘I'm making a cake’).