I could manufacture you could manufacture she could manufacture we could manufacture you could manufacture they could manufacture
V-ing form
I could be manufacturing you could be manufacturing she could be manufacturing we could be manufacturing you could be manufacturing they could be manufacturing
Perfect
I could have manufactured you could have manufactured she could have manufactured we could have manufactured you could have manufactured they could have manufactured
V-ing perfect
I could have been manufacturing you could have been manufacturing she could have been manufacturing we could have been manufacturing you could have been manufacturing they could have been manufacturing
Negation
Simple form
I could not manufacture you could not manufacture she could not manufacture we could not manufacture you could not manufacture they could not manufacture
V-ing form
I could not be manufacturing you could not be manufacturing she could not be manufacturing we could not be manufacturing you could not be manufacturing they could not be manufacturing
Perfect
I could not have manufactured you could not have manufactured she could not have manufactured we could not have manufactured you could not have manufactured they could not have manufactured
V-ing perfect
I could not have been manufacturing you could not have been manufacturing she could not have been manufacturing we could not have been manufacturing you could not have been manufacturing they could not have been manufacturing
Interrogative form
Simple form
could I manufacture? could you manufacture? could she manufacture? could we manufacture? could you manufacture? could they manufacture?
V-ing form
could I be manufacturing? could you be manufacturing? could she be manufacturing? could we be manufacturing? could you be manufacturing? could they be manufacturing?
Perfect
could I have manufactured? could you have manufactured? could she have manufactured? could we have manufactured? could you have manufactured? could they have manufactured?
V-ing perfect
could I have been manufacturing? could you have been manufacturing? could she have been manufacturing? could we have been manufacturing? could you have been manufacturing? could they have been manufacturing?
Interro-negative form
Simple form
could I not manufacture? could you not manufacture? could she not manufacture? could we not manufacture? could you not manufacture? could they not manufacture?
V-ing form
could I not be manufacturing? could you not be manufacturing? could she not be manufacturing? could we not be manufacturing? could you not be manufacturing? could they not be manufacturing?
Perfect
could I not have manufactured? could you not have manufactured? could she not have manufactured? could we not have manufactured? could you not have manufactured? could they not have manufactured?
V-ing perfect
could I not have been manufacturing? could you not have been manufacturing? could she not have been manufacturing? could we not have been manufacturing? could you not have been manufacturing? could they not have been manufacturing?