I could scarify you could scarify he could scarify we could scarify you could scarify they could scarify
V-ing form
I could be scarifying you could be scarifying he could be scarifying we could be scarifying you could be scarifying they could be scarifying
Perfect
I could have scarified you could have scarified he could have scarified we could have scarified you could have scarified they could have scarified
V-ing perfect
I could have been scarifying you could have been scarifying he could have been scarifying we could have been scarifying you could have been scarifying they could have been scarifying
Negation
Simple form
I could not scarify you could not scarify he could not scarify we could not scarify you could not scarify they could not scarify
V-ing form
I could not be scarifying you could not be scarifying he could not be scarifying we could not be scarifying you could not be scarifying they could not be scarifying
Perfect
I could not have scarified you could not have scarified he could not have scarified we could not have scarified you could not have scarified they could not have scarified
V-ing perfect
I could not have been scarifying you could not have been scarifying he could not have been scarifying we could not have been scarifying you could not have been scarifying they could not have been scarifying
Interrogative form
Simple form
could I scarify? could you scarify? could he scarify? could we scarify? could you scarify? could they scarify?
V-ing form
could I be scarifying? could you be scarifying? could he be scarifying? could we be scarifying? could you be scarifying? could they be scarifying?
Perfect
could I have scarified? could you have scarified? could he have scarified? could we have scarified? could you have scarified? could they have scarified?
V-ing perfect
could I have been scarifying? could you have been scarifying? could he have been scarifying? could we have been scarifying? could you have been scarifying? could they have been scarifying?
Interro-negative form
Simple form
could I not scarify? could you not scarify? could he not scarify? could we not scarify? could you not scarify? could they not scarify?
V-ing form
could I not be scarifying? could you not be scarifying? could he not be scarifying? could we not be scarifying? could you not be scarifying? could they not be scarifying?
Perfect
could I not have scarified? could you not have scarified? could he not have scarified? could we not have scarified? could you not have scarified? could they not have scarified?
V-ing perfect
could I not have been scarifying? could you not have been scarifying? could he not have been scarifying? could we not have been scarifying? could you not have been scarifying? could they not have been scarifying?