I could calque you could calque he could calque we could calque you could calque they could calque
V-ing form
I could be calquing you could be calquing he could be calquing we could be calquing you could be calquing they could be calquing
Perfect
I could have calqued you could have calqued he 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 he 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 he 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 he 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 he 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 he 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 he calque? could we calque? could you calque? could they calque?
V-ing form
could I be calquing? could you be calquing? could he be calquing? could we be calquing? could you be calquing? could they be calquing?
Perfect
could I have calqued? could you have calqued? could he 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 he 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 he 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 he 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 he 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 he have been calquing? couldn't we have been calquing? couldn't you have been calquing? couldn't they have been calquing?