English verb conjugation
COULD SEAM

Regular verb: seam - seamed - seamed

Affirmation

Simple form	V-ing form
I could seam you could seam he could seam we could seam you could seam they could seam	I could be seaming you could be seaming he could be seaming we could be seaming you could be seaming they could be seaming
Perfect	V-ing perfect
I could have seamed you could have seamed he could have seamed we could have seamed you could have seamed they could have seamed	I could have been seaming you could have been seaming he could have been seaming we could have been seaming you could have been seaming they could have been seaming

Negation

Simple form	V-ing form
I couldn't seam you couldn't seam he couldn't seam we couldn't seam you couldn't seam they couldn't seam	I couldn't be seaming you couldn't be seaming he couldn't be seaming we couldn't be seaming you couldn't be seaming they couldn't be seaming
Perfect	V-ing perfect
I couldn't have seamed you couldn't have seamed he couldn't have seamed we couldn't have seamed you couldn't have seamed they couldn't have seamed	I couldn't have been seaming you couldn't have been seaming he couldn't have been seaming we couldn't have been seaming you couldn't have been seaming they couldn't have been seaming

Interrogative form

Simple form	V-ing form
could I seam? could you seam? could he seam? could we seam? could you seam? could they seam?	could I be seaming? could you be seaming? could he be seaming? could we be seaming? could you be seaming? could they be seaming?
Perfect	V-ing perfect
could I have seamed? could you have seamed? could he have seamed? could we have seamed? could you have seamed? could they have seamed?	could I have been seaming? could you have been seaming? could he have been seaming? could we have been seaming? could you have been seaming? could they have been seaming?

Interro-negative form

Simple form	V-ing form
couldn't I seam? couldn't you seam? couldn't he seam? couldn't we seam? couldn't you seam? couldn't they seam?	couldn't I be seaming? couldn't you be seaming? couldn't he be seaming? couldn't we be seaming? couldn't you be seaming? couldn't they be seaming?
Perfect	V-ing perfect
couldn't I have seamed? couldn't you have seamed? couldn't he have seamed? couldn't we have seamed? couldn't you have seamed? couldn't they have seamed?	couldn't I have been seaming? couldn't you have been seaming? couldn't he have been seaming? couldn't we have been seaming? couldn't you have been seaming? couldn't they have been seaming?