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 cannot loop you cannot loop he cannot loop we cannot loop you cannot loop they cannot loop	I cannot be looping you cannot be looping he cannot be looping we cannot be looping you cannot be looping they cannot be looping
Perfect	V-ing perfect
I cannot have looped you cannot have looped he cannot have looped we cannot have looped you cannot have looped they cannot have looped	I cannot have been looping you cannot have been looping he cannot have been looping we cannot have been looping you cannot have been looping they cannot 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 I not loop? can you not loop? can he not loop? can we not loop? can you not loop? can they not loop?	can I not be looping? can you not be looping? can he not be looping? can we not be looping? can you not be looping? can they not be looping?
Perfect	V-ing perfect
can I not have looped? can you not have looped? can he not have looped? can we not have looped? can you not have looped? can they not have looped?	can I not have been looping? can you not have been looping? can he not have been looping? can we not have been looping? can you not have been looping? can they not have been looping?