I could hint you could hint he could hint we could hint you could hint they could hint
V-ing form
I could be hinting you could be hinting he could be hinting we could be hinting you could be hinting they could be hinting
Perfect
I could have hinted you could have hinted he could have hinted we could have hinted you could have hinted they could have hinted
V-ing perfect
I could have been hinting you could have been hinting he could have been hinting we could have been hinting you could have been hinting they could have been hinting
Negation
Simple form
I could not hint you could not hint he could not hint we could not hint you could not hint they could not hint
V-ing form
I could not be hinting you could not be hinting he could not be hinting we could not be hinting you could not be hinting they could not be hinting
Perfect
I could not have hinted you could not have hinted he could not have hinted we could not have hinted you could not have hinted they could not have hinted
V-ing perfect
I could not have been hinting you could not have been hinting he could not have been hinting we could not have been hinting you could not have been hinting they could not have been hinting
Interrogative form
Simple form
could I hint? could you hint? could he hint? could we hint? could you hint? could they hint?
V-ing form
could I be hinting? could you be hinting? could he be hinting? could we be hinting? could you be hinting? could they be hinting?
Perfect
could I have hinted? could you have hinted? could he have hinted? could we have hinted? could you have hinted? could they have hinted?
V-ing perfect
could I have been hinting? could you have been hinting? could he have been hinting? could we have been hinting? could you have been hinting? could they have been hinting?
Interro-negative form
Simple form
could I not hint? could you not hint? could he not hint? could we not hint? could you not hint? could they not hint?
V-ing form
could I not be hinting? could you not be hinting? could he not be hinting? could we not be hinting? could you not be hinting? could they not be hinting?
Perfect
could I not have hinted? could you not have hinted? could he not have hinted? could we not have hinted? could you not have hinted? could they not have hinted?
V-ing perfect
could I not have been hinting? could you not have been hinting? could he not have been hinting? could we not have been hinting? could you not have been hinting? could they not have been hinting?