English verb conjugation
COULD SNICKER

Regular verb: snicker - snickered - snickered

Affirmation

Simple form	V-ing form
I could snicker you could snicker he could snicker we could snicker you could snicker they could snicker	I could be snickering you could be snickering he could be snickering we could be snickering you could be snickering they could be snickering
Perfect	V-ing perfect
I could have snickered you could have snickered he could have snickered we could have snickered you could have snickered they could have snickered	I could have been snickering you could have been snickering he could have been snickering we could have been snickering you could have been snickering they could have been snickering

Negation

Simple form	V-ing form
I couldn't snicker you couldn't snicker he couldn't snicker we couldn't snicker you couldn't snicker they couldn't snicker	I couldn't be snickering you couldn't be snickering he couldn't be snickering we couldn't be snickering you couldn't be snickering they couldn't be snickering
Perfect	V-ing perfect
I couldn't have snickered you couldn't have snickered he couldn't have snickered we couldn't have snickered you couldn't have snickered they couldn't have snickered	I couldn't have been snickering you couldn't have been snickering he couldn't have been snickering we couldn't have been snickering you couldn't have been snickering they couldn't have been snickering

Interrogative form

Simple form	V-ing form
could I snicker? could you snicker? could he snicker? could we snicker? could you snicker? could they snicker?	could I be snickering? could you be snickering? could he be snickering? could we be snickering? could you be snickering? could they be snickering?
Perfect	V-ing perfect
could I have snickered? could you have snickered? could he have snickered? could we have snickered? could you have snickered? could they have snickered?	could I have been snickering? could you have been snickering? could he have been snickering? could we have been snickering? could you have been snickering? could they have been snickering?

Interro-negative form

Simple form	V-ing form
couldn't I snicker? couldn't you snicker? couldn't he snicker? couldn't we snicker? couldn't you snicker? couldn't they snicker?	couldn't I be snickering? couldn't you be snickering? couldn't he be snickering? couldn't we be snickering? couldn't you be snickering? couldn't they be snickering?
Perfect	V-ing perfect
couldn't I have snickered? couldn't you have snickered? couldn't he have snickered? couldn't we have snickered? couldn't you have snickered? couldn't they have snickered?	couldn't I have been snickering? couldn't you have been snickering? couldn't he have been snickering? couldn't we have been snickering? couldn't you have been snickering? couldn't they have been snickering?