I could proportion you could proportion she could proportion we could proportion you could proportion they could proportion
V-ing form
I could be proportioning you could be proportioning she could be proportioning we could be proportioning you could be proportioning they could be proportioning
Perfect
I could have proportioned you could have proportioned she could have proportioned we could have proportioned you could have proportioned they could have proportioned
V-ing perfect
I could have been proportioning you could have been proportioning she could have been proportioning we could have been proportioning you could have been proportioning they could have been proportioning
Negation
Simple form
I couldn't proportion you couldn't proportion she couldn't proportion we couldn't proportion you couldn't proportion they couldn't proportion
V-ing form
I couldn't be proportioning you couldn't be proportioning she couldn't be proportioning we couldn't be proportioning you couldn't be proportioning they couldn't be proportioning
Perfect
I couldn't have proportioned you couldn't have proportioned she couldn't have proportioned we couldn't have proportioned you couldn't have proportioned they couldn't have proportioned
V-ing perfect
I couldn't have been proportioning you couldn't have been proportioning she couldn't have been proportioning we couldn't have been proportioning you couldn't have been proportioning they couldn't have been proportioning
Interrogative form
Simple form
could I proportion? could you proportion? could she proportion? could we proportion? could you proportion? could they proportion?
V-ing form
could I be proportioning? could you be proportioning? could she be proportioning? could we be proportioning? could you be proportioning? could they be proportioning?
Perfect
could I have proportioned? could you have proportioned? could she have proportioned? could we have proportioned? could you have proportioned? could they have proportioned?
V-ing perfect
could I have been proportioning? could you have been proportioning? could she have been proportioning? could we have been proportioning? could you have been proportioning? could they have been proportioning?
Interro-negative form
Simple form
couldn't I proportion? couldn't you proportion? couldn't she proportion? couldn't we proportion? couldn't you proportion? couldn't they proportion?
V-ing form
couldn't I be proportioning? couldn't you be proportioning? couldn't she be proportioning? couldn't we be proportioning? couldn't you be proportioning? couldn't they be proportioning?
Perfect
couldn't I have proportioned? couldn't you have proportioned? couldn't she have proportioned? couldn't we have proportioned? couldn't you have proportioned? couldn't they have proportioned?
V-ing perfect
couldn't I have been proportioning? couldn't you have been proportioning? couldn't she have been proportioning? couldn't we have been proportioning? couldn't you have been proportioning? couldn't they have been proportioning?