I could spruce you could spruce he could spruce we could spruce you could spruce they could spruce
V-ing form
I could be sprucing you could be sprucing he could be sprucing we could be sprucing you could be sprucing they could be sprucing
Perfect
I could have spruced you could have spruced he 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 he could have been sprucing we could have been sprucing you could have been sprucing they could have been sprucing
Negation
Simple form
I could not spruce you could not spruce he could not spruce we could not spruce you could not spruce they could not spruce
V-ing form
I could not be sprucing you could not be sprucing he could not be sprucing we could not be sprucing you could not be sprucing they could not be sprucing
Perfect
I could not have spruced you could not have spruced he could not have spruced we could not have spruced you could not have spruced they could not have spruced
V-ing perfect
I could not have been sprucing you could not have been sprucing he could not have been sprucing we could not have been sprucing you could not have been sprucing they could not have been sprucing
Interrogative form
Simple form
could I spruce? could you spruce? could he spruce? could we spruce? could you spruce? could they spruce?
V-ing form
could I be sprucing? could you be sprucing? could he be sprucing? could we be sprucing? could you be sprucing? could they be sprucing?
Perfect
could I have spruced? could you have spruced? could he 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 he have been sprucing? could we have been sprucing? could you have been sprucing? could they have been sprucing?
Interro-negative form
Simple form
could I not spruce? could you not spruce? could he not spruce? could we not spruce? could you not spruce? could they not spruce?
V-ing form
could I not be sprucing? could you not be sprucing? could he not be sprucing? could we not be sprucing? could you not be sprucing? could they not be sprucing?
Perfect
could I not have spruced? could you not have spruced? could he not have spruced? could we not have spruced? could you not have spruced? could they not have spruced?
V-ing perfect
could I not have been sprucing? could you not have been sprucing? could he not have been sprucing? could we not have been sprucing? could you not have been sprucing? could they not have been sprucing?