English verb conjugation
COULD STOPPLE

Regular verb: stopple - stoppled - stoppled

Affirmation

Simple form	V-ing form
I could stopple you could stopple he could stopple we could stopple you could stopple they could stopple	I could be stoppling you could be stoppling he could be stoppling we could be stoppling you could be stoppling they could be stoppling
Perfect	V-ing perfect
I could have stoppled you could have stoppled he could have stoppled we could have stoppled you could have stoppled they could have stoppled	I could have been stoppling you could have been stoppling he could have been stoppling we could have been stoppling you could have been stoppling they could have been stoppling

Negation

Simple form	V-ing form
I couldn't stopple you couldn't stopple he couldn't stopple we couldn't stopple you couldn't stopple they couldn't stopple	I couldn't be stoppling you couldn't be stoppling he couldn't be stoppling we couldn't be stoppling you couldn't be stoppling they couldn't be stoppling
Perfect	V-ing perfect
I couldn't have stoppled you couldn't have stoppled he couldn't have stoppled we couldn't have stoppled you couldn't have stoppled they couldn't have stoppled	I couldn't have been stoppling you couldn't have been stoppling he couldn't have been stoppling we couldn't have been stoppling you couldn't have been stoppling they couldn't have been stoppling

Interrogative form

Simple form	V-ing form
could I stopple? could you stopple? could he stopple? could we stopple? could you stopple? could they stopple?	could I be stoppling? could you be stoppling? could he be stoppling? could we be stoppling? could you be stoppling? could they be stoppling?
Perfect	V-ing perfect
could I have stoppled? could you have stoppled? could he have stoppled? could we have stoppled? could you have stoppled? could they have stoppled?	could I have been stoppling? could you have been stoppling? could he have been stoppling? could we have been stoppling? could you have been stoppling? could they have been stoppling?

Interro-negative form

Simple form	V-ing form
couldn't I stopple? couldn't you stopple? couldn't he stopple? couldn't we stopple? couldn't you stopple? couldn't they stopple?	couldn't I be stoppling? couldn't you be stoppling? couldn't he be stoppling? couldn't we be stoppling? couldn't you be stoppling? couldn't they be stoppling?
Perfect	V-ing perfect
couldn't I have stoppled? couldn't you have stoppled? couldn't he have stoppled? couldn't we have stoppled? couldn't you have stoppled? couldn't they have stoppled?	couldn't I have been stoppling? couldn't you have been stoppling? couldn't he have been stoppling? couldn't we have been stoppling? couldn't you have been stoppling? couldn't they have been stoppling?