I could boggie you could boggie he could boggie we could boggie you could boggie they could boggie
V-ing form
I could be boggying you could be boggying he could be boggying we could be boggying you could be boggying they could be boggying
Perfect
I could have boggied you could have boggied he could have boggied we could have boggied you could have boggied they could have boggied
V-ing perfect
I could have been boggying you could have been boggying he could have been boggying we could have been boggying you could have been boggying they could have been boggying
Negation
Simple form
I could not boggie you could not boggie he could not boggie we could not boggie you could not boggie they could not boggie
V-ing form
I could not be boggying you could not be boggying he could not be boggying we could not be boggying you could not be boggying they could not be boggying
Perfect
I could not have boggied you could not have boggied he could not have boggied we could not have boggied you could not have boggied they could not have boggied
V-ing perfect
I could not have been boggying you could not have been boggying he could not have been boggying we could not have been boggying you could not have been boggying they could not have been boggying
Interrogative form
Simple form
could I boggie? could you boggie? could he boggie? could we boggie? could you boggie? could they boggie?
V-ing form
could I be boggying? could you be boggying? could he be boggying? could we be boggying? could you be boggying? could they be boggying?
Perfect
could I have boggied? could you have boggied? could he have boggied? could we have boggied? could you have boggied? could they have boggied?
V-ing perfect
could I have been boggying? could you have been boggying? could he have been boggying? could we have been boggying? could you have been boggying? could they have been boggying?
Interro-negative form
Simple form
could I not boggie? could you not boggie? could he not boggie? could we not boggie? could you not boggie? could they not boggie?
V-ing form
could I not be boggying? could you not be boggying? could he not be boggying? could we not be boggying? could you not be boggying? could they not be boggying?
Perfect
could I not have boggied? could you not have boggied? could he not have boggied? could we not have boggied? could you not have boggied? could they not have boggied?
V-ing perfect
could I not have been boggying? could you not have been boggying? could he not have been boggying? could we not have been boggying? could you not have been boggying? could they not have been boggying?