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