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 can't study you can't study he can't study we can't study you can't study they can't study	I can't be studying you can't be studying he can't be studying we can't be studying you can't be studying they can't be studying
Perfect	V-ing perfect
I can't have studied you can't have studied he can't have studied we can't have studied you can't have studied they can't have studied	I can't have been studying you can't have been studying he can't have been studying we can't have been studying you can't have been studying they can't 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't I study? can't you study? can't he study? can't we study? can't you study? can't they study?	can't I be studying? can't you be studying? can't he be studying? can't we be studying? can't you be studying? can't they be studying?
Perfect	V-ing perfect
can't I have studied? can't you have studied? can't he have studied? can't we have studied? can't you have studied? can't they have studied?	can't I have been studying? can't you have been studying? can't he have been studying? can't we have been studying? can't you have been studying? can't they have been studying?