English verb conjugation
COULD CONSTRUCT

Regular verb: construct - constructed - constructed

Affirmation

Simple form	V-ing form
I could construct you could construct she could construct we could construct you could construct they could construct	I could be constructing you could be constructing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she construct? could we construct? could you construct? could they construct?	could I be constructing? could you be constructing? could she 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 she 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 she 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 she 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 she 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 she 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 she have been constructing? couldn't we have been constructing? couldn't you have been constructing? couldn't they have been constructing?