English verb conjugation
COULD CEIL

Regular verb: ceil - ceiled - ceiled

Affirmation

Simple form	V-ing form
I could ceil you could ceil he could ceil we could ceil you could ceil they could ceil	I could be ceiling you could be ceiling he could be ceiling we could be ceiling you could be ceiling they could be ceiling
Perfect	V-ing perfect
I could have ceiled you could have ceiled he could have ceiled we could have ceiled you could have ceiled they could have ceiled	I could have been ceiling you could have been ceiling he could have been ceiling we could have been ceiling you could have been ceiling they could have been ceiling

Negation

Simple form	V-ing form
I couldn't ceil you couldn't ceil he couldn't ceil we couldn't ceil you couldn't ceil they couldn't ceil	I couldn't be ceiling you couldn't be ceiling he couldn't be ceiling we couldn't be ceiling you couldn't be ceiling they couldn't be ceiling
Perfect	V-ing perfect
I couldn't have ceiled you couldn't have ceiled he couldn't have ceiled we couldn't have ceiled you couldn't have ceiled they couldn't have ceiled	I couldn't have been ceiling you couldn't have been ceiling he couldn't have been ceiling we couldn't have been ceiling you couldn't have been ceiling they couldn't have been ceiling

Interrogative form

Simple form	V-ing form
could I ceil? could you ceil? could he ceil? could we ceil? could you ceil? could they ceil?	could I be ceiling? could you be ceiling? could he be ceiling? could we be ceiling? could you be ceiling? could they be ceiling?
Perfect	V-ing perfect
could I have ceiled? could you have ceiled? could he have ceiled? could we have ceiled? could you have ceiled? could they have ceiled?	could I have been ceiling? could you have been ceiling? could he have been ceiling? could we have been ceiling? could you have been ceiling? could they have been ceiling?

Interro-negative form

Simple form	V-ing form
couldn't I ceil? couldn't you ceil? couldn't he ceil? couldn't we ceil? couldn't you ceil? couldn't they ceil?	couldn't I be ceiling? couldn't you be ceiling? couldn't he be ceiling? couldn't we be ceiling? couldn't you be ceiling? couldn't they be ceiling?
Perfect	V-ing perfect
couldn't I have ceiled? couldn't you have ceiled? couldn't he have ceiled? couldn't we have ceiled? couldn't you have ceiled? couldn't they have ceiled?	couldn't I have been ceiling? couldn't you have been ceiling? couldn't he have been ceiling? couldn't we have been ceiling? couldn't you have been ceiling? couldn't they have been ceiling?