I could snoop you could snoop she could snoop we could snoop you could snoop they could snoop
V-ing form
I could be snooping you could be snooping she could be snooping we could be snooping you could be snooping they could be snooping
Perfect
I could have snooped you could have snooped she could have snooped we could have snooped you could have snooped they could have snooped
V-ing perfect
I could have been snooping you could have been snooping she could have been snooping we could have been snooping you could have been snooping they could have been snooping
Negation
Simple form
I could not snoop you could not snoop she could not snoop we could not snoop you could not snoop they could not snoop
V-ing form
I could not be snooping you could not be snooping she could not be snooping we could not be snooping you could not be snooping they could not be snooping
Perfect
I could not have snooped you could not have snooped she could not have snooped we could not have snooped you could not have snooped they could not have snooped
V-ing perfect
I could not have been snooping you could not have been snooping she could not have been snooping we could not have been snooping you could not have been snooping they could not have been snooping
Interrogative form
Simple form
could I snoop? could you snoop? could she snoop? could we snoop? could you snoop? could they snoop?
V-ing form
could I be snooping? could you be snooping? could she be snooping? could we be snooping? could you be snooping? could they be snooping?
Perfect
could I have snooped? could you have snooped? could she have snooped? could we have snooped? could you have snooped? could they have snooped?
V-ing perfect
could I have been snooping? could you have been snooping? could she have been snooping? could we have been snooping? could you have been snooping? could they have been snooping?
Interro-negative form
Simple form
could I not snoop? could you not snoop? could she not snoop? could we not snoop? could you not snoop? could they not snoop?
V-ing form
could I not be snooping? could you not be snooping? could she not be snooping? could we not be snooping? could you not be snooping? could they not be snooping?
Perfect
could I not have snooped? could you not have snooped? could she not have snooped? could we not have snooped? could you not have snooped? could they not have snooped?
V-ing perfect
could I not have been snooping? could you not have been snooping? could she not have been snooping? could we not have been snooping? could you not have been snooping? could they not have been snooping?