English verb conjugation
COULD DARKLE

Regular verb: darkle - darkled - darkled

Affirmation

Simple form	V-ing form
I could darkle you could darkle he could darkle we could darkle you could darkle they could darkle	I could be darkling you could be darkling he could be darkling we could be darkling you could be darkling they could be darkling
Perfect	V-ing perfect
I could have darkled you could have darkled he could have darkled we could have darkled you could have darkled they could have darkled	I could have been darkling you could have been darkling he could have been darkling we could have been darkling you could have been darkling they could have been darkling

Negation

Simple form	V-ing form
I couldn't darkle you couldn't darkle he couldn't darkle we couldn't darkle you couldn't darkle they couldn't darkle	I couldn't be darkling you couldn't be darkling he couldn't be darkling we couldn't be darkling you couldn't be darkling they couldn't be darkling
Perfect	V-ing perfect
I couldn't have darkled you couldn't have darkled he couldn't have darkled we couldn't have darkled you couldn't have darkled they couldn't have darkled	I couldn't have been darkling you couldn't have been darkling he couldn't have been darkling we couldn't have been darkling you couldn't have been darkling they couldn't have been darkling

Interrogative form

Simple form	V-ing form
could I darkle? could you darkle? could he darkle? could we darkle? could you darkle? could they darkle?	could I be darkling? could you be darkling? could he be darkling? could we be darkling? could you be darkling? could they be darkling?
Perfect	V-ing perfect
could I have darkled? could you have darkled? could he have darkled? could we have darkled? could you have darkled? could they have darkled?	could I have been darkling? could you have been darkling? could he have been darkling? could we have been darkling? could you have been darkling? could they have been darkling?

Interro-negative form

Simple form	V-ing form
couldn't I darkle? couldn't you darkle? couldn't he darkle? couldn't we darkle? couldn't you darkle? couldn't they darkle?	couldn't I be darkling? couldn't you be darkling? couldn't he be darkling? couldn't we be darkling? couldn't you be darkling? couldn't they be darkling?
Perfect	V-ing perfect
couldn't I have darkled? couldn't you have darkled? couldn't he have darkled? couldn't we have darkled? couldn't you have darkled? couldn't they have darkled?	couldn't I have been darkling? couldn't you have been darkling? couldn't he have been darkling? couldn't we have been darkling? couldn't you have been darkling? couldn't they have been darkling?