I could calumniate you could calumniate he could calumniate we could calumniate you could calumniate they could calumniate
V-ing form
I could be calumniating you could be calumniating he could be calumniating we could be calumniating you could be calumniating they could be calumniating
Perfect
I could have calumniated you could have calumniated he could have calumniated we could have calumniated you could have calumniated they could have calumniated
V-ing perfect
I could have been calumniating you could have been calumniating he could have been calumniating we could have been calumniating you could have been calumniating they could have been calumniating
Negation
Simple form
I couldn't calumniate you couldn't calumniate he couldn't calumniate we couldn't calumniate you couldn't calumniate they couldn't calumniate
V-ing form
I couldn't be calumniating you couldn't be calumniating he couldn't be calumniating we couldn't be calumniating you couldn't be calumniating they couldn't be calumniating
Perfect
I couldn't have calumniated you couldn't have calumniated he couldn't have calumniated we couldn't have calumniated you couldn't have calumniated they couldn't have calumniated
V-ing perfect
I couldn't have been calumniating you couldn't have been calumniating he couldn't have been calumniating we couldn't have been calumniating you couldn't have been calumniating they couldn't have been calumniating
Interrogative form
Simple form
could I calumniate? could you calumniate? could he calumniate? could we calumniate? could you calumniate? could they calumniate?
V-ing form
could I be calumniating? could you be calumniating? could he be calumniating? could we be calumniating? could you be calumniating? could they be calumniating?
Perfect
could I have calumniated? could you have calumniated? could he have calumniated? could we have calumniated? could you have calumniated? could they have calumniated?
V-ing perfect
could I have been calumniating? could you have been calumniating? could he have been calumniating? could we have been calumniating? could you have been calumniating? could they have been calumniating?
Interro-negative form
Simple form
couldn't I calumniate? couldn't you calumniate? couldn't he calumniate? couldn't we calumniate? couldn't you calumniate? couldn't they calumniate?
V-ing form
couldn't I be calumniating? couldn't you be calumniating? couldn't he be calumniating? couldn't we be calumniating? couldn't you be calumniating? couldn't they be calumniating?
Perfect
couldn't I have calumniated? couldn't you have calumniated? couldn't he have calumniated? couldn't we have calumniated? couldn't you have calumniated? couldn't they have calumniated?
V-ing perfect
couldn't I have been calumniating? couldn't you have been calumniating? couldn't he have been calumniating? couldn't we have been calumniating? couldn't you have been calumniating? couldn't they have been calumniating?