English verb conjugation
CAN CEIL

Regular verb: ceil - ceiled - ceiled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can I not ceil? can you not ceil? can he not ceil? can we not ceil? can you not ceil? can they not ceil?	can I not be ceiling? can you not be ceiling? can he not be ceiling? can we not be ceiling? can you not be ceiling? can they not be ceiling?
Perfect	V-ing perfect
can I not have ceiled? can you not have ceiled? can he not have ceiled? can we not have ceiled? can you not have ceiled? can they not have ceiled?	can I not have been ceiling? can you not have been ceiling? can he not have been ceiling? can we not have been ceiling? can you not have been ceiling? can they not have been ceiling?