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