English verb conjugation
COULD CALIPER

Regular verb: caliper - calipered - calipered

Affirmation

Simple form	V-ing form
I could caliper you could caliper he could caliper we could caliper you could caliper they could caliper	I could be calipering you could be calipering he could be calipering we could be calipering you could be calipering they could be calipering
Perfect	V-ing perfect
I could have calipered you could have calipered he could have calipered we could have calipered you could have calipered they could have calipered	I could have been calipering you could have been calipering he could have been calipering we could have been calipering you could have been calipering they could have been calipering

Negation

Simple form	V-ing form
I couldn't caliper you couldn't caliper he couldn't caliper we couldn't caliper you couldn't caliper they couldn't caliper	I couldn't be calipering you couldn't be calipering he couldn't be calipering we couldn't be calipering you couldn't be calipering they couldn't be calipering
Perfect	V-ing perfect
I couldn't have calipered you couldn't have calipered he couldn't have calipered we couldn't have calipered you couldn't have calipered they couldn't have calipered	I couldn't have been calipering you couldn't have been calipering he couldn't have been calipering we couldn't have been calipering you couldn't have been calipering they couldn't have been calipering

Interrogative form

Simple form	V-ing form
could I caliper? could you caliper? could he caliper? could we caliper? could you caliper? could they caliper?	could I be calipering? could you be calipering? could he be calipering? could we be calipering? could you be calipering? could they be calipering?
Perfect	V-ing perfect
could I have calipered? could you have calipered? could he have calipered? could we have calipered? could you have calipered? could they have calipered?	could I have been calipering? could you have been calipering? could he have been calipering? could we have been calipering? could you have been calipering? could they have been calipering?

Interro-negative form

Simple form	V-ing form
couldn't I caliper? couldn't you caliper? couldn't he caliper? couldn't we caliper? couldn't you caliper? couldn't they caliper?	couldn't I be calipering? couldn't you be calipering? couldn't he be calipering? couldn't we be calipering? couldn't you be calipering? couldn't they be calipering?
Perfect	V-ing perfect
couldn't I have calipered? couldn't you have calipered? couldn't he have calipered? couldn't we have calipered? couldn't you have calipered? couldn't they have calipered?	couldn't I have been calipering? couldn't you have been calipering? couldn't he have been calipering? couldn't we have been calipering? couldn't you have been calipering? couldn't they have been calipering?