English verb conjugation
COULD MOTTLE

Regular verb: mottle - mottled - mottled

Affirmation

Simple form	V-ing form
I could mottle you could mottle he could mottle we could mottle you could mottle they could mottle	I could be mottling you could be mottling he could be mottling we could be mottling you could be mottling they could be mottling
Perfect	V-ing perfect
I could have mottled you could have mottled he could have mottled we could have mottled you could have mottled they could have mottled	I could have been mottling you could have been mottling he could have been mottling we could have been mottling you could have been mottling they could have been mottling

Negation

Simple form	V-ing form
I couldn't mottle you couldn't mottle he couldn't mottle we couldn't mottle you couldn't mottle they couldn't mottle	I couldn't be mottling you couldn't be mottling he couldn't be mottling we couldn't be mottling you couldn't be mottling they couldn't be mottling
Perfect	V-ing perfect
I couldn't have mottled you couldn't have mottled he couldn't have mottled we couldn't have mottled you couldn't have mottled they couldn't have mottled	I couldn't have been mottling you couldn't have been mottling he couldn't have been mottling we couldn't have been mottling you couldn't have been mottling they couldn't have been mottling

Interrogative form

Simple form	V-ing form
could I mottle? could you mottle? could he mottle? could we mottle? could you mottle? could they mottle?	could I be mottling? could you be mottling? could he be mottling? could we be mottling? could you be mottling? could they be mottling?
Perfect	V-ing perfect
could I have mottled? could you have mottled? could he have mottled? could we have mottled? could you have mottled? could they have mottled?	could I have been mottling? could you have been mottling? could he have been mottling? could we have been mottling? could you have been mottling? could they have been mottling?

Interro-negative form

Simple form	V-ing form
couldn't I mottle? couldn't you mottle? couldn't he mottle? couldn't we mottle? couldn't you mottle? couldn't they mottle?	couldn't I be mottling? couldn't you be mottling? couldn't he be mottling? couldn't we be mottling? couldn't you be mottling? couldn't they be mottling?
Perfect	V-ing perfect
couldn't I have mottled? couldn't you have mottled? couldn't he have mottled? couldn't we have mottled? couldn't you have mottled? couldn't they have mottled?	couldn't I have been mottling? couldn't you have been mottling? couldn't he have been mottling? couldn't we have been mottling? couldn't you have been mottling? couldn't they have been mottling?