English verb conjugation
COULD MANUFACTURE

Regular verb: manufacture - manufactured - manufactured

Affirmation

Simple form	V-ing form
I could manufacture you could manufacture he could manufacture we could manufacture you could manufacture they could manufacture	I could be manufacturing you could be manufacturing he could be manufacturing we could be manufacturing you could be manufacturing they could be manufacturing
Perfect	V-ing perfect
I could have manufactured you could have manufactured he could have manufactured we could have manufactured you could have manufactured they could have manufactured	I could have been manufacturing you could have been manufacturing he could have been manufacturing we could have been manufacturing you could have been manufacturing they could have been manufacturing

Negation

Simple form	V-ing form
I couldn't manufacture you couldn't manufacture he couldn't manufacture we couldn't manufacture you couldn't manufacture they couldn't manufacture	I couldn't be manufacturing you couldn't be manufacturing he couldn't be manufacturing we couldn't be manufacturing you couldn't be manufacturing they couldn't be manufacturing
Perfect	V-ing perfect
I couldn't have manufactured you couldn't have manufactured he couldn't have manufactured we couldn't have manufactured you couldn't have manufactured they couldn't have manufactured	I couldn't have been manufacturing you couldn't have been manufacturing he couldn't have been manufacturing we couldn't have been manufacturing you couldn't have been manufacturing they couldn't have been manufacturing

Interrogative form

Simple form	V-ing form
could I manufacture? could you manufacture? could he manufacture? could we manufacture? could you manufacture? could they manufacture?	could I be manufacturing? could you be manufacturing? could he be manufacturing? could we be manufacturing? could you be manufacturing? could they be manufacturing?
Perfect	V-ing perfect
could I have manufactured? could you have manufactured? could he have manufactured? could we have manufactured? could you have manufactured? could they have manufactured?	could I have been manufacturing? could you have been manufacturing? could he have been manufacturing? could we have been manufacturing? could you have been manufacturing? could they have been manufacturing?

Interro-negative form

Simple form	V-ing form
couldn't I manufacture? couldn't you manufacture? couldn't he manufacture? couldn't we manufacture? couldn't you manufacture? couldn't they manufacture?	couldn't I be manufacturing? couldn't you be manufacturing? couldn't he be manufacturing? couldn't we be manufacturing? couldn't you be manufacturing? couldn't they be manufacturing?
Perfect	V-ing perfect
couldn't I have manufactured? couldn't you have manufactured? couldn't he have manufactured? couldn't we have manufactured? couldn't you have manufactured? couldn't they have manufactured?	couldn't I have been manufacturing? couldn't you have been manufacturing? couldn't he have been manufacturing? couldn't we have been manufacturing? couldn't you have been manufacturing? couldn't they have been manufacturing?