English verb conjugation
CAN STUDY

Regular verb: study - studied - studied

Affirmation

Simple form	V-ing form
I can study you can study he can study we can study you can study they can study	I can be studying you can be studying he can be studying we can be studying you can be studying they can be studying
Perfect	V-ing perfect
I can have studied you can have studied he can have studied we can have studied you can have studied they can have studied	I can have been studying you can have been studying he can have been studying we can have been studying you can have been studying they can have been studying

Negation

Simple form	V-ing form
I cannot study you cannot study he cannot study we cannot study you cannot study they cannot study	I cannot be studying you cannot be studying he cannot be studying we cannot be studying you cannot be studying they cannot be studying
Perfect	V-ing perfect
I cannot have studied you cannot have studied he cannot have studied we cannot have studied you cannot have studied they cannot have studied	I cannot have been studying you cannot have been studying he cannot have been studying we cannot have been studying you cannot have been studying they cannot have been studying

Interrogative form

Simple form	V-ing form
can I study? can you study? can he study? can we study? can you study? can they study?	can I be studying? can you be studying? can he be studying? can we be studying? can you be studying? can they be studying?
Perfect	V-ing perfect
can I have studied? can you have studied? can he have studied? can we have studied? can you have studied? can they have studied?	can I have been studying? can you have been studying? can he have been studying? can we have been studying? can you have been studying? can they have been studying?

Interro-negative form

Simple form	V-ing form
can I not study? can you not study? can he not study? can we not study? can you not study? can they not study?	can I not be studying? can you not be studying? can he not be studying? can we not be studying? can you not be studying? can they not be studying?
Perfect	V-ing perfect
can I not have studied? can you not have studied? can he not have studied? can we not have studied? can you not have studied? can they not have studied?	can I not have been studying? can you not have been studying? can he not have been studying? can we not have been studying? can you not have been studying? can they not have been studying?