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