I could marinate you could marinate she could marinate we could marinate you could marinate they could marinate
V-ing form
I could be marinating you could be marinating she could be marinating we could be marinating you could be marinating they could be marinating
Perfect
I could have marinated you could have marinated she could have marinated we could have marinated you could have marinated they could have marinated
V-ing perfect
I could have been marinating you could have been marinating she could have been marinating we could have been marinating you could have been marinating they could have been marinating
Negation
Simple form
I couldn't marinate you couldn't marinate she couldn't marinate we couldn't marinate you couldn't marinate they couldn't marinate
V-ing form
I couldn't be marinating you couldn't be marinating she couldn't be marinating we couldn't be marinating you couldn't be marinating they couldn't be marinating
Perfect
I couldn't have marinated you couldn't have marinated she couldn't have marinated we couldn't have marinated you couldn't have marinated they couldn't have marinated
V-ing perfect
I couldn't have been marinating you couldn't have been marinating she couldn't have been marinating we couldn't have been marinating you couldn't have been marinating they couldn't have been marinating
Interrogative form
Simple form
could I marinate? could you marinate? could she marinate? could we marinate? could you marinate? could they marinate?
V-ing form
could I be marinating? could you be marinating? could she be marinating? could we be marinating? could you be marinating? could they be marinating?
Perfect
could I have marinated? could you have marinated? could she have marinated? could we have marinated? could you have marinated? could they have marinated?
V-ing perfect
could I have been marinating? could you have been marinating? could she have been marinating? could we have been marinating? could you have been marinating? could they have been marinating?
Interro-negative form
Simple form
couldn't I marinate? couldn't you marinate? couldn't she marinate? couldn't we marinate? couldn't you marinate? couldn't they marinate?
V-ing form
couldn't I be marinating? couldn't you be marinating? couldn't she be marinating? couldn't we be marinating? couldn't you be marinating? couldn't they be marinating?
Perfect
couldn't I have marinated? couldn't you have marinated? couldn't she have marinated? couldn't we have marinated? couldn't you have marinated? couldn't they have marinated?
V-ing perfect
couldn't I have been marinating? couldn't you have been marinating? couldn't she have been marinating? couldn't we have been marinating? couldn't you have been marinating? couldn't they have been marinating?