English verb conjugation
COULD CONTROL

Regular verb: control - controlled - controlled

Affirmation

Simple form	V-ing form
I could control you could control he could control we could control you could control they could control	I could be controlling you could be controlling he could be controlling we could be controlling you could be controlling they could be controlling
Perfect	V-ing perfect
I could have controlled you could have controlled he could have controlled we could have controlled you could have controlled they could have controlled	I could have been controlling you could have been controlling he could have been controlling we could have been controlling you could have been controlling they could have been controlling

Negation

Simple form	V-ing form
I couldn't control you couldn't control he couldn't control we couldn't control you couldn't control they couldn't control	I couldn't be controlling you couldn't be controlling he couldn't be controlling we couldn't be controlling you couldn't be controlling they couldn't be controlling
Perfect	V-ing perfect
I couldn't have controlled you couldn't have controlled he couldn't have controlled we couldn't have controlled you couldn't have controlled they couldn't have controlled	I couldn't have been controlling you couldn't have been controlling he couldn't have been controlling we couldn't have been controlling you couldn't have been controlling they couldn't have been controlling

Interrogative form

Simple form	V-ing form
could I control? could you control? could he control? could we control? could you control? could they control?	could I be controlling? could you be controlling? could he be controlling? could we be controlling? could you be controlling? could they be controlling?
Perfect	V-ing perfect
could I have controlled? could you have controlled? could he have controlled? could we have controlled? could you have controlled? could they have controlled?	could I have been controlling? could you have been controlling? could he have been controlling? could we have been controlling? could you have been controlling? could they have been controlling?

Interro-negative form

Simple form	V-ing form
couldn't I control? couldn't you control? couldn't he control? couldn't we control? couldn't you control? couldn't they control?	couldn't I be controlling? couldn't you be controlling? couldn't he be controlling? couldn't we be controlling? couldn't you be controlling? couldn't they be controlling?
Perfect	V-ing perfect
couldn't I have controlled? couldn't you have controlled? couldn't he have controlled? couldn't we have controlled? couldn't you have controlled? couldn't they have controlled?	couldn't I have been controlling? couldn't you have been controlling? couldn't he have been controlling? couldn't we have been controlling? couldn't you have been controlling? couldn't they have been controlling?