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