English verb conjugation
COULD CONSTRUCT

Regular verb: construct - constructed - constructed

Affirmation

Simple form	V-ing form
I could construct you could construct he could construct we could construct you could construct they could construct	I could be constructing you could be constructing he could be constructing we could be constructing you could be constructing they could be constructing
Perfect	V-ing perfect
I could have constructed you could have constructed he could have constructed we could have constructed you could have constructed they could have constructed	I could have been constructing you could have been constructing he could have been constructing we could have been constructing you could have been constructing they could have been constructing

Negation

Simple form	V-ing form
I couldn't construct you couldn't construct he couldn't construct we couldn't construct you couldn't construct they couldn't construct	I couldn't be constructing you couldn't be constructing he couldn't be constructing we couldn't be constructing you couldn't be constructing they couldn't be constructing
Perfect	V-ing perfect
I couldn't have constructed you couldn't have constructed he couldn't have constructed we couldn't have constructed you couldn't have constructed they couldn't have constructed	I couldn't have been constructing you couldn't have been constructing he couldn't have been constructing we couldn't have been constructing you couldn't have been constructing they couldn't have been constructing

Interrogative form

Simple form	V-ing form
could I construct? could you construct? could he construct? could we construct? could you construct? could they construct?	could I be constructing? could you be constructing? could he be constructing? could we be constructing? could you be constructing? could they be constructing?
Perfect	V-ing perfect
could I have constructed? could you have constructed? could he have constructed? could we have constructed? could you have constructed? could they have constructed?	could I have been constructing? could you have been constructing? could he have been constructing? could we have been constructing? could you have been constructing? could they have been constructing?

Interro-negative form

Simple form	V-ing form
couldn't I construct? couldn't you construct? couldn't he construct? couldn't we construct? couldn't you construct? couldn't they construct?	couldn't I be constructing? couldn't you be constructing? couldn't he be constructing? couldn't we be constructing? couldn't you be constructing? couldn't they be constructing?
Perfect	V-ing perfect
couldn't I have constructed? couldn't you have constructed? couldn't he have constructed? couldn't we have constructed? couldn't you have constructed? couldn't they have constructed?	couldn't I have been constructing? couldn't you have been constructing? couldn't he have been constructing? couldn't we have been constructing? couldn't you have been constructing? couldn't they have been constructing?