I could pitapat you could pitapat he could pitapat we could pitapat you could pitapat they could pitapat
V-ing form
I could be pitapating you could be pitapating he could be pitapating we could be pitapating you could be pitapating they could be pitapating
Perfect
I could have pitapated you could have pitapated he could have pitapated we could have pitapated you could have pitapated they could have pitapated
V-ing perfect
I could have been pitapating you could have been pitapating he could have been pitapating we could have been pitapating you could have been pitapating they could have been pitapating
Negation
Simple form
I could not pitapat you could not pitapat he could not pitapat we could not pitapat you could not pitapat they could not pitapat
V-ing form
I could not be pitapating you could not be pitapating he could not be pitapating we could not be pitapating you could not be pitapating they could not be pitapating
Perfect
I could not have pitapated you could not have pitapated he could not have pitapated we could not have pitapated you could not have pitapated they could not have pitapated
V-ing perfect
I could not have been pitapating you could not have been pitapating he could not have been pitapating we could not have been pitapating you could not have been pitapating they could not have been pitapating
Interrogative form
Simple form
could I pitapat? could you pitapat? could he pitapat? could we pitapat? could you pitapat? could they pitapat?
V-ing form
could I be pitapating? could you be pitapating? could he be pitapating? could we be pitapating? could you be pitapating? could they be pitapating?
Perfect
could I have pitapated? could you have pitapated? could he have pitapated? could we have pitapated? could you have pitapated? could they have pitapated?
V-ing perfect
could I have been pitapating? could you have been pitapating? could he have been pitapating? could we have been pitapating? could you have been pitapating? could they have been pitapating?
Interro-negative form
Simple form
could I not pitapat? could you not pitapat? could he not pitapat? could we not pitapat? could you not pitapat? could they not pitapat?
V-ing form
could I not be pitapating? could you not be pitapating? could he not be pitapating? could we not be pitapating? could you not be pitapating? could they not be pitapating?
Perfect
could I not have pitapated? could you not have pitapated? could he not have pitapated? could we not have pitapated? could you not have pitapated? could they not have pitapated?
V-ing perfect
could I not have been pitapating? could you not have been pitapating? could he not have been pitapating? could we not have been pitapating? could you not have been pitapating? could they not have been pitapating?