English verb conjugation
CAN COMMENCE

Regular verb: commence - commenced - commenced

Affirmation

Simple form	V-ing form
I can commence you can commence he can commence we can commence you can commence they can commence	I can be commencing you can be commencing he can be commencing we can be commencing you can be commencing they can be commencing
Perfect	V-ing perfect
I can have commenced you can have commenced he can have commenced we can have commenced you can have commenced they can have commenced	I can have been commencing you can have been commencing he can have been commencing we can have been commencing you can have been commencing they can have been commencing

Negation

Simple form	V-ing form
I can't commence you can't commence he can't commence we can't commence you can't commence they can't commence	I can't be commencing you can't be commencing he can't be commencing we can't be commencing you can't be commencing they can't be commencing
Perfect	V-ing perfect
I can't have commenced you can't have commenced he can't have commenced we can't have commenced you can't have commenced they can't have commenced	I can't have been commencing you can't have been commencing he can't have been commencing we can't have been commencing you can't have been commencing they can't have been commencing

Interrogative form

Simple form	V-ing form
can I commence? can you commence? can he commence? can we commence? can you commence? can they commence?	can I be commencing? can you be commencing? can he be commencing? can we be commencing? can you be commencing? can they be commencing?
Perfect	V-ing perfect
can I have commenced? can you have commenced? can he have commenced? can we have commenced? can you have commenced? can they have commenced?	can I have been commencing? can you have been commencing? can he have been commencing? can we have been commencing? can you have been commencing? can they have been commencing?

Interro-negative form

Simple form	V-ing form
can't I commence? can't you commence? can't he commence? can't we commence? can't you commence? can't they commence?	can't I be commencing? can't you be commencing? can't he be commencing? can't we be commencing? can't you be commencing? can't they be commencing?
Perfect	V-ing perfect
can't I have commenced? can't you have commenced? can't he have commenced? can't we have commenced? can't you have commenced? can't they have commenced?	can't I have been commencing? can't you have been commencing? can't he have been commencing? can't we have been commencing? can't you have been commencing? can't they have been commencing?