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