English verb conjugation
COULD INFILTRATE

Regular verb: infiltrate - infiltrated - infiltrated

Affirmation

Simple form	V-ing form
I could infiltrate you could infiltrate he could infiltrate we could infiltrate you could infiltrate they could infiltrate	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	V-ing 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	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	V-ing form
I couldn't infiltrate you couldn't infiltrate he couldn't infiltrate we couldn't infiltrate you couldn't infiltrate they couldn't infiltrate	I couldn't be infiltrating you couldn't be infiltrating he couldn't be infiltrating we couldn't be infiltrating you couldn't be infiltrating they couldn't be infiltrating
Perfect	V-ing perfect
I couldn't have infiltrated you couldn't have infiltrated he couldn't have infiltrated we couldn't have infiltrated you couldn't have infiltrated they couldn't have infiltrated	I couldn't have been infiltrating you couldn't have been infiltrating he couldn't have been infiltrating we couldn't have been infiltrating you couldn't have been infiltrating they couldn't have been infiltrating

Interrogative form

Simple form	V-ing form
could I infiltrate? could you infiltrate? could he infiltrate? could we infiltrate? could you infiltrate? could they infiltrate?	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	V-ing 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?	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	V-ing form
couldn't I infiltrate? couldn't you infiltrate? couldn't he infiltrate? couldn't we infiltrate? couldn't you infiltrate? couldn't they infiltrate?	couldn't I be infiltrating? couldn't you be infiltrating? couldn't he be infiltrating? couldn't we be infiltrating? couldn't you be infiltrating? couldn't they be infiltrating?
Perfect	V-ing perfect
couldn't I have infiltrated? couldn't you have infiltrated? couldn't he have infiltrated? couldn't we have infiltrated? couldn't you have infiltrated? couldn't they have infiltrated?	couldn't I have been infiltrating? couldn't you have been infiltrating? couldn't he have been infiltrating? couldn't we have been infiltrating? couldn't you have been infiltrating? couldn't they have been infiltrating?