English verb conjugation
CAN CLICK

Regular verb: click - clicked - clicked

Affirmation

Simple form	V-ing form
I can click you can click he can click we can click you can click they can click	I can be clicking you can be clicking he can be clicking we can be clicking you can be clicking they can be clicking
Perfect	V-ing perfect
I can have clicked you can have clicked he can have clicked we can have clicked you can have clicked they can have clicked	I can have been clicking you can have been clicking he can have been clicking we can have been clicking you can have been clicking they can have been clicking

Negation

Simple form	V-ing form
I can't click you can't click he can't click we can't click you can't click they can't click	I can't be clicking you can't be clicking he can't be clicking we can't be clicking you can't be clicking they can't be clicking
Perfect	V-ing perfect
I can't have clicked you can't have clicked he can't have clicked we can't have clicked you can't have clicked they can't have clicked	I can't have been clicking you can't have been clicking he can't have been clicking we can't have been clicking you can't have been clicking they can't have been clicking

Interrogative form

Simple form	V-ing form
can I click? can you click? can he click? can we click? can you click? can they click?	can I be clicking? can you be clicking? can he be clicking? can we be clicking? can you be clicking? can they be clicking?
Perfect	V-ing perfect
can I have clicked? can you have clicked? can he have clicked? can we have clicked? can you have clicked? can they have clicked?	can I have been clicking? can you have been clicking? can he have been clicking? can we have been clicking? can you have been clicking? can they have been clicking?

Interro-negative form

Simple form	V-ing form
can't I click? can't you click? can't he click? can't we click? can't you click? can't they click?	can't I be clicking? can't you be clicking? can't he be clicking? can't we be clicking? can't you be clicking? can't they be clicking?
Perfect	V-ing perfect
can't I have clicked? can't you have clicked? can't he have clicked? can't we have clicked? can't you have clicked? can't they have clicked?	can't I have been clicking? can't you have been clicking? can't he have been clicking? can't we have been clicking? can't you have been clicking? can't they have been clicking?