English verb conjugation
COULD COMMENCE

Regular verb: commence - commenced - commenced

Affirmation

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

Negation

Simple form	V-ing form
I could not commence you could not commence he could not commence we could not commence you could not commence they could not commence	I could not be commencing you could not be commencing he could not be commencing we could not be commencing you could not be commencing they could not be commencing
Perfect	V-ing perfect
I could not have commenced you could not have commenced he could not have commenced we could not have commenced you could not have commenced they could not have commenced	I could not have been commencing you could not have been commencing he could not have been commencing we could not have been commencing you could not have been commencing they could not have been commencing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not commence? could you not commence? could he not commence? could we not commence? could you not commence? could they not commence?	could I not be commencing? could you not be commencing? could he not be commencing? could we not be commencing? could you not be commencing? could they not be commencing?
Perfect	V-ing perfect
could I not have commenced? could you not have commenced? could he not have commenced? could we not have commenced? could you not have commenced? could they not have commenced?	could I not have been commencing? could you not have been commencing? could he not have been commencing? could we not have been commencing? could you not have been commencing? could they not have been commencing?