English verb conjugation
COULD STIPULATE

Regular verb: stipulate - stipulated - stipulated

Affirmation

Simple form	V-ing form
I could stipulate you could stipulate he could stipulate we could stipulate you could stipulate they could stipulate	I could be stipulating you could be stipulating he could be stipulating we could be stipulating you could be stipulating they could be stipulating
Perfect	V-ing perfect
I could have stipulated you could have stipulated he could have stipulated we could have stipulated you could have stipulated they could have stipulated	I could have been stipulating you could have been stipulating he could have been stipulating we could have been stipulating you could have been stipulating they could have been stipulating

Negation

Simple form	V-ing form
I could not stipulate you could not stipulate he could not stipulate we could not stipulate you could not stipulate they could not stipulate	I could not be stipulating you could not be stipulating he could not be stipulating we could not be stipulating you could not be stipulating they could not be stipulating
Perfect	V-ing perfect
I could not have stipulated you could not have stipulated he could not have stipulated we could not have stipulated you could not have stipulated they could not have stipulated	I could not have been stipulating you could not have been stipulating he could not have been stipulating we could not have been stipulating you could not have been stipulating they could not have been stipulating

Interrogative form

Simple form	V-ing form
could I stipulate? could you stipulate? could he stipulate? could we stipulate? could you stipulate? could they stipulate?	could I be stipulating? could you be stipulating? could he be stipulating? could we be stipulating? could you be stipulating? could they be stipulating?
Perfect	V-ing perfect
could I have stipulated? could you have stipulated? could he have stipulated? could we have stipulated? could you have stipulated? could they have stipulated?	could I have been stipulating? could you have been stipulating? could he have been stipulating? could we have been stipulating? could you have been stipulating? could they have been stipulating?

Interro-negative form

Simple form	V-ing form
could I not stipulate? could you not stipulate? could he not stipulate? could we not stipulate? could you not stipulate? could they not stipulate?	could I not be stipulating? could you not be stipulating? could he not be stipulating? could we not be stipulating? could you not be stipulating? could they not be stipulating?
Perfect	V-ing perfect
could I not have stipulated? could you not have stipulated? could he not have stipulated? could we not have stipulated? could you not have stipulated? could they not have stipulated?	could I not have been stipulating? could you not have been stipulating? could he not have been stipulating? could we not have been stipulating? could you not have been stipulating? could they not have been stipulating?