English verb conjugation
COULD RETILE

Regular verb: retile - retiled - retiled

Affirmation

Simple form	V-ing form
I could retile you could retile he could retile we could retile you could retile they could retile	I could be retiling you could be retiling he could be retiling we could be retiling you could be retiling they could be retiling
Perfect	V-ing perfect
I could have retiled you could have retiled he could have retiled we could have retiled you could have retiled they could have retiled	I could have been retiling you could have been retiling he could have been retiling we could have been retiling you could have been retiling they could have been retiling

Negation

Simple form	V-ing form
I couldn't retile you couldn't retile he couldn't retile we couldn't retile you couldn't retile they couldn't retile	I couldn't be retiling you couldn't be retiling he couldn't be retiling we couldn't be retiling you couldn't be retiling they couldn't be retiling
Perfect	V-ing perfect
I couldn't have retiled you couldn't have retiled he couldn't have retiled we couldn't have retiled you couldn't have retiled they couldn't have retiled	I couldn't have been retiling you couldn't have been retiling he couldn't have been retiling we couldn't have been retiling you couldn't have been retiling they couldn't have been retiling

Interrogative form

Simple form	V-ing form
could I retile? could you retile? could he retile? could we retile? could you retile? could they retile?	could I be retiling? could you be retiling? could he be retiling? could we be retiling? could you be retiling? could they be retiling?
Perfect	V-ing perfect
could I have retiled? could you have retiled? could he have retiled? could we have retiled? could you have retiled? could they have retiled?	could I have been retiling? could you have been retiling? could he have been retiling? could we have been retiling? could you have been retiling? could they have been retiling?

Interro-negative form

Simple form	V-ing form
couldn't I retile? couldn't you retile? couldn't he retile? couldn't we retile? couldn't you retile? couldn't they retile?	couldn't I be retiling? couldn't you be retiling? couldn't he be retiling? couldn't we be retiling? couldn't you be retiling? couldn't they be retiling?
Perfect	V-ing perfect
couldn't I have retiled? couldn't you have retiled? couldn't he have retiled? couldn't we have retiled? couldn't you have retiled? couldn't they have retiled?	couldn't I have been retiling? couldn't you have been retiling? couldn't he have been retiling? couldn't we have been retiling? couldn't you have been retiling? couldn't they have been retiling?