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