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