English verb conjugation
COULD MOUSE

Regular verb: mouse - moused - moused

Affirmation

Simple form	V-ing form
I could mouse you could mouse she could mouse we could mouse you could mouse they could mouse	I could be mousing you could be mousing she could be mousing we could be mousing you could be mousing they could be mousing
Perfect	V-ing perfect
I could have moused you could have moused she could have moused we could have moused you could have moused they could have moused	I could have been mousing you could have been mousing she could have been mousing we could have been mousing you could have been mousing they could have been mousing

Negation

Simple form	V-ing form
I couldn't mouse you couldn't mouse she couldn't mouse we couldn't mouse you couldn't mouse they couldn't mouse	I couldn't be mousing you couldn't be mousing she couldn't be mousing we couldn't be mousing you couldn't be mousing they couldn't be mousing
Perfect	V-ing perfect
I couldn't have moused you couldn't have moused she couldn't have moused we couldn't have moused you couldn't have moused they couldn't have moused	I couldn't have been mousing you couldn't have been mousing she couldn't have been mousing we couldn't have been mousing you couldn't have been mousing they couldn't have been mousing

Interrogative form

Simple form	V-ing form
could I mouse? could you mouse? could she mouse? could we mouse? could you mouse? could they mouse?	could I be mousing? could you be mousing? could she be mousing? could we be mousing? could you be mousing? could they be mousing?
Perfect	V-ing perfect
could I have moused? could you have moused? could she have moused? could we have moused? could you have moused? could they have moused?	could I have been mousing? could you have been mousing? could she have been mousing? could we have been mousing? could you have been mousing? could they have been mousing?

Interro-negative form

Simple form	V-ing form
couldn't I mouse? couldn't you mouse? couldn't she mouse? couldn't we mouse? couldn't you mouse? couldn't they mouse?	couldn't I be mousing? couldn't you be mousing? couldn't she be mousing? couldn't we be mousing? couldn't you be mousing? couldn't they be mousing?
Perfect	V-ing perfect
couldn't I have moused? couldn't you have moused? couldn't she have moused? couldn't we have moused? couldn't you have moused? couldn't they have moused?	couldn't I have been mousing? couldn't you have been mousing? couldn't she have been mousing? couldn't we have been mousing? couldn't you have been mousing? couldn't they have been mousing?