I could lam you could lam he could lam we could lam you could lam they could lam
V-ing form
I could be lamming you could be lamming he could be lamming we could be lamming you could be lamming they could be lamming
Perfect
I could have lammed you could have lammed he could have lammed we could have lammed you could have lammed they could have lammed
V-ing perfect
I could have been lamming you could have been lamming he could have been lamming we could have been lamming you could have been lamming they could have been lamming
Negation
Simple form
I couldn't lam you couldn't lam he couldn't lam we couldn't lam you couldn't lam they couldn't lam
V-ing form
I couldn't be lamming you couldn't be lamming he couldn't be lamming we couldn't be lamming you couldn't be lamming they couldn't be lamming
Perfect
I couldn't have lammed you couldn't have lammed he couldn't have lammed we couldn't have lammed you couldn't have lammed they couldn't have lammed
V-ing perfect
I couldn't have been lamming you couldn't have been lamming he couldn't have been lamming we couldn't have been lamming you couldn't have been lamming they couldn't have been lamming
Interrogative form
Simple form
could I lam? could you lam? could he lam? could we lam? could you lam? could they lam?
V-ing form
could I be lamming? could you be lamming? could he be lamming? could we be lamming? could you be lamming? could they be lamming?
Perfect
could I have lammed? could you have lammed? could he have lammed? could we have lammed? could you have lammed? could they have lammed?
V-ing perfect
could I have been lamming? could you have been lamming? could he have been lamming? could we have been lamming? could you have been lamming? could they have been lamming?
Interro-negative form
Simple form
couldn't I lam? couldn't you lam? couldn't he lam? couldn't we lam? couldn't you lam? couldn't they lam?
V-ing form
couldn't I be lamming? couldn't you be lamming? couldn't he be lamming? couldn't we be lamming? couldn't you be lamming? couldn't they be lamming?
Perfect
couldn't I have lammed? couldn't you have lammed? couldn't he have lammed? couldn't we have lammed? couldn't you have lammed? couldn't they have lammed?
V-ing perfect
couldn't I have been lamming? couldn't you have been lamming? couldn't he have been lamming? couldn't we have been lamming? couldn't you have been lamming? couldn't they have been lamming?