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