I could lollop you could lollop he could lollop we could lollop you could lollop they could lollop
V-ing form
I could be lolloping you could be lolloping he could be lolloping we could be lolloping you could be lolloping they could be lolloping
Perfect
I could have lolloped you could have lolloped he could have lolloped we could have lolloped you could have lolloped they could have lolloped
V-ing perfect
I could have been lolloping you could have been lolloping he could have been lolloping we could have been lolloping you could have been lolloping they could have been lolloping
Negation
Simple form
I could not lollop you could not lollop he could not lollop we could not lollop you could not lollop they could not lollop
V-ing form
I could not be lolloping you could not be lolloping he could not be lolloping we could not be lolloping you could not be lolloping they could not be lolloping
Perfect
I could not have lolloped you could not have lolloped he could not have lolloped we could not have lolloped you could not have lolloped they could not have lolloped
V-ing perfect
I could not have been lolloping you could not have been lolloping he could not have been lolloping we could not have been lolloping you could not have been lolloping they could not have been lolloping
Interrogative form
Simple form
could I lollop? could you lollop? could he lollop? could we lollop? could you lollop? could they lollop?
V-ing form
could I be lolloping? could you be lolloping? could he be lolloping? could we be lolloping? could you be lolloping? could they be lolloping?
Perfect
could I have lolloped? could you have lolloped? could he have lolloped? could we have lolloped? could you have lolloped? could they have lolloped?
V-ing perfect
could I have been lolloping? could you have been lolloping? could he have been lolloping? could we have been lolloping? could you have been lolloping? could they have been lolloping?
Interro-negative form
Simple form
could I not lollop? could you not lollop? could he not lollop? could we not lollop? could you not lollop? could they not lollop?
V-ing form
could I not be lolloping? could you not be lolloping? could he not be lolloping? could we not be lolloping? could you not be lolloping? could they not be lolloping?
Perfect
could I not have lolloped? could you not have lolloped? could he not have lolloped? could we not have lolloped? could you not have lolloped? could they not have lolloped?
V-ing perfect
could I not have been lolloping? could you not have been lolloping? could he not have been lolloping? could we not have been lolloping? could you not have been lolloping? could they not have been lolloping?