English verb conjugation
CAN PEAK

Regular verb: peak - peaked - peaked

Affirmation

Simple form	V-ing form
I can peak you can peak he can peak we can peak you can peak they can peak	I can be peaking you can be peaking he can be peaking we can be peaking you can be peaking they can be peaking
Perfect	V-ing perfect
I can have peaked you can have peaked he can have peaked we can have peaked you can have peaked they can have peaked	I can have been peaking you can have been peaking he can have been peaking we can have been peaking you can have been peaking they can have been peaking

Negation

Simple form	V-ing form
I can't peak you can't peak he can't peak we can't peak you can't peak they can't peak	I can't be peaking you can't be peaking he can't be peaking we can't be peaking you can't be peaking they can't be peaking
Perfect	V-ing perfect
I can't have peaked you can't have peaked he can't have peaked we can't have peaked you can't have peaked they can't have peaked	I can't have been peaking you can't have been peaking he can't have been peaking we can't have been peaking you can't have been peaking they can't have been peaking

Interrogative form

Simple form	V-ing form
can I peak? can you peak? can he peak? can we peak? can you peak? can they peak?	can I be peaking? can you be peaking? can he be peaking? can we be peaking? can you be peaking? can they be peaking?
Perfect	V-ing perfect
can I have peaked? can you have peaked? can he have peaked? can we have peaked? can you have peaked? can they have peaked?	can I have been peaking? can you have been peaking? can he have been peaking? can we have been peaking? can you have been peaking? can they have been peaking?

Interro-negative form

Simple form	V-ing form
can't I peak? can't you peak? can't he peak? can't we peak? can't you peak? can't they peak?	can't I be peaking? can't you be peaking? can't he be peaking? can't we be peaking? can't you be peaking? can't they be peaking?
Perfect	V-ing perfect
can't I have peaked? can't you have peaked? can't he have peaked? can't we have peaked? can't you have peaked? can't they have peaked?	can't I have been peaking? can't you have been peaking? can't he have been peaking? can't we have been peaking? can't you have been peaking? can't they have been peaking?