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 cannot peak you cannot peak he cannot peak we cannot peak you cannot peak they cannot peak	I cannot be peaking you cannot be peaking he cannot be peaking we cannot be peaking you cannot be peaking they cannot be peaking
Perfect	V-ing perfect
I cannot have peaked you cannot have peaked he cannot have peaked we cannot have peaked you cannot have peaked they cannot have peaked	I cannot have been peaking you cannot have been peaking he cannot have been peaking we cannot have been peaking you cannot have been peaking they cannot 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 I not peak? can you not peak? can he not peak? can we not peak? can you not peak? can they not peak?	can I not be peaking? can you not be peaking? can he not be peaking? can we not be peaking? can you not be peaking? can they not be peaking?
Perfect	V-ing perfect
can I not have peaked? can you not have peaked? can he not have peaked? can we not have peaked? can you not have peaked? can they not have peaked?	can I not have been peaking? can you not have been peaking? can he not have been peaking? can we not have been peaking? can you not have been peaking? can they not have been peaking?