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