English verb conjugation
CAN RUN

Irregular verb: run - ran - run

Affirmation

Simple form	V-ing form
I can run you can run she can run we can run you can run they can run	I can be running you can be running she 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 she 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 she 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 can't run you can't run she can't run we can't run you can't run they can't run	I can't be running you can't be running she can't be running we can't be running you can't be running they can't be running
Perfect	V-ing perfect
I can't have run you can't have run she can't have run we can't have run you can't have run they can't have run	I can't have been running you can't have been running she can't have been running we can't have been running you can't have been running they can't have been running

Interrogative form

Simple form	V-ing form
can I run? can you run? can she run? can we run? can you run? can they run?	can I be running? can you be running? can she 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 she 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 she 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't I run? can't you run? can't she run? can't we run? can't you run? can't they run?	can't I be running? can't you be running? can't she be running? can't we be running? can't you be running? can't they be running?
Perfect	V-ing perfect
can't I have run? can't you have run? can't she have run? can't we have run? can't you have run? can't they have run?	can't I have been running? can't you have been running? can't she have been running? can't we have been running? can't you have been running? can't they have been running?