English verb conjugation
COULD CALENDER

Regular verb: calender - calendered - calendered

Affirmation

Simple form	V-ing form
I could calender you could calender he could calender we could calender you could calender they could calender	I could be calendering you could be calendering he could be calendering we could be calendering you could be calendering they could be calendering
Perfect	V-ing perfect
I could have calendered you could have calendered he could have calendered we could have calendered you could have calendered they could have calendered	I could have been calendering you could have been calendering he could have been calendering we could have been calendering you could have been calendering they could have been calendering

Negation

Simple form	V-ing form
I could not calender you could not calender he could not calender we could not calender you could not calender they could not calender	I could not be calendering you could not be calendering he could not be calendering we could not be calendering you could not be calendering they could not be calendering
Perfect	V-ing perfect
I could not have calendered you could not have calendered he could not have calendered we could not have calendered you could not have calendered they could not have calendered	I could not have been calendering you could not have been calendering he could not have been calendering we could not have been calendering you could not have been calendering they could not have been calendering

Interrogative form

Simple form	V-ing form
could I calender? could you calender? could he calender? could we calender? could you calender? could they calender?	could I be calendering? could you be calendering? could he be calendering? could we be calendering? could you be calendering? could they be calendering?
Perfect	V-ing perfect
could I have calendered? could you have calendered? could he have calendered? could we have calendered? could you have calendered? could they have calendered?	could I have been calendering? could you have been calendering? could he have been calendering? could we have been calendering? could you have been calendering? could they have been calendering?

Interro-negative form

Simple form	V-ing form
could I not calender? could you not calender? could he not calender? could we not calender? could you not calender? could they not calender?	could I not be calendering? could you not be calendering? could he not be calendering? could we not be calendering? could you not be calendering? could they not be calendering?
Perfect	V-ing perfect
could I not have calendered? could you not have calendered? could he not have calendered? could we not have calendered? could you not have calendered? could they not have calendered?	could I not have been calendering? could you not have been calendering? could he not have been calendering? could we not have been calendering? could you not have been calendering? could they not have been calendering?