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