I could infiltrate you could infiltrate he could infiltrate we could infiltrate you could infiltrate they could infiltrate
V-ing form
I could be infiltrating you could be infiltrating he could be infiltrating we could be infiltrating you could be infiltrating they could be infiltrating
Perfect
I could have infiltrated you could have infiltrated he could have infiltrated we could have infiltrated you could have infiltrated they could have infiltrated
V-ing perfect
I could have been infiltrating you could have been infiltrating he could have been infiltrating we could have been infiltrating you could have been infiltrating they could have been infiltrating
Negation
Simple form
I could not infiltrate you could not infiltrate he could not infiltrate we could not infiltrate you could not infiltrate they could not infiltrate
V-ing form
I could not be infiltrating you could not be infiltrating he could not be infiltrating we could not be infiltrating you could not be infiltrating they could not be infiltrating
Perfect
I could not have infiltrated you could not have infiltrated he could not have infiltrated we could not have infiltrated you could not have infiltrated they could not have infiltrated
V-ing perfect
I could not have been infiltrating you could not have been infiltrating he could not have been infiltrating we could not have been infiltrating you could not have been infiltrating they could not have been infiltrating
Interrogative form
Simple form
could I infiltrate? could you infiltrate? could he infiltrate? could we infiltrate? could you infiltrate? could they infiltrate?
V-ing form
could I be infiltrating? could you be infiltrating? could he be infiltrating? could we be infiltrating? could you be infiltrating? could they be infiltrating?
Perfect
could I have infiltrated? could you have infiltrated? could he have infiltrated? could we have infiltrated? could you have infiltrated? could they have infiltrated?
V-ing perfect
could I have been infiltrating? could you have been infiltrating? could he have been infiltrating? could we have been infiltrating? could you have been infiltrating? could they have been infiltrating?
Interro-negative form
Simple form
could I not infiltrate? could you not infiltrate? could he not infiltrate? could we not infiltrate? could you not infiltrate? could they not infiltrate?
V-ing form
could I not be infiltrating? could you not be infiltrating? could he not be infiltrating? could we not be infiltrating? could you not be infiltrating? could they not be infiltrating?
Perfect
could I not have infiltrated? could you not have infiltrated? could he not have infiltrated? could we not have infiltrated? could you not have infiltrated? could they not have infiltrated?
V-ing perfect
could I not have been infiltrating? could you not have been infiltrating? could he not have been infiltrating? could we not have been infiltrating? could you not have been infiltrating? could they not have been infiltrating?