English verb conjugation
COULD SNIGGER

Regular verb: snigger - sniggered - sniggered

Affirmation

Simple form	V-ing form
I could snigger you could snigger he could snigger we could snigger you could snigger they could snigger	I could be sniggering you could be sniggering he could be sniggering we could be sniggering you could be sniggering they could be sniggering
Perfect	V-ing perfect
I could have sniggered you could have sniggered he could have sniggered we could have sniggered you could have sniggered they could have sniggered	I could have been sniggering you could have been sniggering he could have been sniggering we could have been sniggering you could have been sniggering they could have been sniggering

Negation

Simple form	V-ing form
I couldn't snigger you couldn't snigger he couldn't snigger we couldn't snigger you couldn't snigger they couldn't snigger	I couldn't be sniggering you couldn't be sniggering he couldn't be sniggering we couldn't be sniggering you couldn't be sniggering they couldn't be sniggering
Perfect	V-ing perfect
I couldn't have sniggered you couldn't have sniggered he couldn't have sniggered we couldn't have sniggered you couldn't have sniggered they couldn't have sniggered	I couldn't have been sniggering you couldn't have been sniggering he couldn't have been sniggering we couldn't have been sniggering you couldn't have been sniggering they couldn't have been sniggering

Interrogative form

Simple form	V-ing form
could I snigger? could you snigger? could he snigger? could we snigger? could you snigger? could they snigger?	could I be sniggering? could you be sniggering? could he be sniggering? could we be sniggering? could you be sniggering? could they be sniggering?
Perfect	V-ing perfect
could I have sniggered? could you have sniggered? could he have sniggered? could we have sniggered? could you have sniggered? could they have sniggered?	could I have been sniggering? could you have been sniggering? could he have been sniggering? could we have been sniggering? could you have been sniggering? could they have been sniggering?

Interro-negative form

Simple form	V-ing form
couldn't I snigger? couldn't you snigger? couldn't he snigger? couldn't we snigger? couldn't you snigger? couldn't they snigger?	couldn't I be sniggering? couldn't you be sniggering? couldn't he be sniggering? couldn't we be sniggering? couldn't you be sniggering? couldn't they be sniggering?
Perfect	V-ing perfect
couldn't I have sniggered? couldn't you have sniggered? couldn't he have sniggered? couldn't we have sniggered? couldn't you have sniggered? couldn't they have sniggered?	couldn't I have been sniggering? couldn't you have been sniggering? couldn't he have been sniggering? couldn't we have been sniggering? couldn't you have been sniggering? couldn't they have been sniggering?