I could calque you could calque she could calque we could calque you could calque they could calque
V-ing form
I could be calquing you could be calquing she could be calquing we could be calquing you could be calquing they could be calquing
Perfect
I could have calqued you could have calqued she could have calqued we could have calqued you could have calqued they could have calqued
V-ing perfect
I could have been calquing you could have been calquing she could have been calquing we could have been calquing you could have been calquing they could have been calquing
Negation
Simple form
I couldn't calque you couldn't calque she couldn't calque we couldn't calque you couldn't calque they couldn't calque
V-ing form
I couldn't be calquing you couldn't be calquing she couldn't be calquing we couldn't be calquing you couldn't be calquing they couldn't be calquing
Perfect
I couldn't have calqued you couldn't have calqued she couldn't have calqued we couldn't have calqued you couldn't have calqued they couldn't have calqued
V-ing perfect
I couldn't have been calquing you couldn't have been calquing she couldn't have been calquing we couldn't have been calquing you couldn't have been calquing they couldn't have been calquing
Interrogative form
Simple form
could I calque? could you calque? could she calque? could we calque? could you calque? could they calque?
V-ing form
could I be calquing? could you be calquing? could she be calquing? could we be calquing? could you be calquing? could they be calquing?
Perfect
could I have calqued? could you have calqued? could she have calqued? could we have calqued? could you have calqued? could they have calqued?
V-ing perfect
could I have been calquing? could you have been calquing? could she have been calquing? could we have been calquing? could you have been calquing? could they have been calquing?
Interro-negative form
Simple form
couldn't I calque? couldn't you calque? couldn't she calque? couldn't we calque? couldn't you calque? couldn't they calque?
V-ing form
couldn't I be calquing? couldn't you be calquing? couldn't she be calquing? couldn't we be calquing? couldn't you be calquing? couldn't they be calquing?
Perfect
couldn't I have calqued? couldn't you have calqued? couldn't she have calqued? couldn't we have calqued? couldn't you have calqued? couldn't they have calqued?
V-ing perfect
couldn't I have been calquing? couldn't you have been calquing? couldn't she have been calquing? couldn't we have been calquing? couldn't you have been calquing? couldn't they have been calquing?