Afirmativa

I study --- you study --- he/she/it studies --- we study --- you study --- they study

Negativa

I do not study --- you do not study --- he/she/it does not study --- we do not study --- you do not study --- they do not study

Interrogativa

Do I study? --- do you study? --- does he/she/it study? --- do we study? --- do you study? --- do they study?

Present continuous

I am studying --- you are studying --- he/she/it is studying --- we are studying --- you are studying --- they are studying