English verb conjugation
CAN LOOP

Regular verb: loop - looped - looped

Affirmation

Simple form	V-ing form
I can loop you can loop he can loop we can loop you can loop they can loop	I can be looping you can be looping he can be looping we can be looping you can be looping they can be looping
Perfect	V-ing perfect
I can have looped you can have looped he can have looped we can have looped you can have looped they can have looped	I can have been looping you can have been looping he can have been looping we can have been looping you can have been looping they can have been looping

Negation

Simple form	V-ing form
I can't loop you can't loop he can't loop we can't loop you can't loop they can't loop	I can't be looping you can't be looping he can't be looping we can't be looping you can't be looping they can't be looping
Perfect	V-ing perfect
I can't have looped you can't have looped he can't have looped we can't have looped you can't have looped they can't have looped	I can't have been looping you can't have been looping he can't have been looping we can't have been looping you can't have been looping they can't have been looping

Interrogative form

Simple form	V-ing form
can I loop? can you loop? can he loop? can we loop? can you loop? can they loop?	can I be looping? can you be looping? can he be looping? can we be looping? can you be looping? can they be looping?
Perfect	V-ing perfect
can I have looped? can you have looped? can he have looped? can we have looped? can you have looped? can they have looped?	can I have been looping? can you have been looping? can he have been looping? can we have been looping? can you have been looping? can they have been looping?

Interro-negative form

Simple form	V-ing form
can't I loop? can't you loop? can't he loop? can't we loop? can't you loop? can't they loop?	can't I be looping? can't you be looping? can't he be looping? can't we be looping? can't you be looping? can't they be looping?
Perfect	V-ing perfect
can't I have looped? can't you have looped? can't he have looped? can't we have looped? can't you have looped? can't they have looped?	can't I have been looping? can't you have been looping? can't he have been looping? can't we have been looping? can't you have been looping? can't they have been looping?