English verb conjugation
CAN RUN

Irregular verb: run - ran - run

Affirmation

Simple form	V-ing form
I can run you can run he can run we can run you can run they can run	I can be running you can be running he can be running we can be running you can be running they can be running
Perfect	V-ing perfect
I can have run you can have run he can have run we can have run you can have run they can have run	I can have been running you can have been running he can have been running we can have been running you can have been running they can have been running

Negation

Simple form	V-ing form
I cannot run you cannot run he cannot run we cannot run you cannot run they cannot run	I cannot be running you cannot be running he cannot be running we cannot be running you cannot be running they cannot be running
Perfect	V-ing perfect
I cannot have run you cannot have run he cannot have run we cannot have run you cannot have run they cannot have run	I cannot have been running you cannot have been running he cannot have been running we cannot have been running you cannot have been running they cannot have been running

Interrogative form

Simple form	V-ing form
can I run? can you run? can he run? can we run? can you run? can they run?	can I be running? can you be running? can he be running? can we be running? can you be running? can they be running?
Perfect	V-ing perfect
can I have run? can you have run? can he have run? can we have run? can you have run? can they have run?	can I have been running? can you have been running? can he have been running? can we have been running? can you have been running? can they have been running?

Interro-negative form

Simple form	V-ing form
can I not run? can you not run? can he not run? can we not run? can you not run? can they not run?	can I not be running? can you not be running? can he not be running? can we not be running? can you not be running? can they not be running?
Perfect	V-ing perfect
can I not have run? can you not have run? can he not have run? can we not have run? can you not have run? can they not have run?	can I not have been running? can you not have been running? can he not have been running? can we not have been running? can you not have been running? can they not have been running?