English verb conjugation
COULD SPILE

Regular verb: spile - spiled - spiled

Affirmation

Simple form	V-ing form
I could spile you could spile he could spile we could spile you could spile they could spile	I could be spiling you could be spiling he could be spiling we could be spiling you could be spiling they could be spiling
Perfect	V-ing perfect
I could have spiled you could have spiled he could have spiled we could have spiled you could have spiled they could have spiled	I could have been spiling you could have been spiling he could have been spiling we could have been spiling you could have been spiling they could have been spiling

Negation

Simple form	V-ing form
I could not spile you could not spile he could not spile we could not spile you could not spile they could not spile	I could not be spiling you could not be spiling he could not be spiling we could not be spiling you could not be spiling they could not be spiling
Perfect	V-ing perfect
I could not have spiled you could not have spiled he could not have spiled we could not have spiled you could not have spiled they could not have spiled	I could not have been spiling you could not have been spiling he could not have been spiling we could not have been spiling you could not have been spiling they could not have been spiling

Interrogative form

Simple form	V-ing form
could I spile? could you spile? could he spile? could we spile? could you spile? could they spile?	could I be spiling? could you be spiling? could he be spiling? could we be spiling? could you be spiling? could they be spiling?
Perfect	V-ing perfect
could I have spiled? could you have spiled? could he have spiled? could we have spiled? could you have spiled? could they have spiled?	could I have been spiling? could you have been spiling? could he have been spiling? could we have been spiling? could you have been spiling? could they have been spiling?

Interro-negative form

Simple form	V-ing form
could I not spile? could you not spile? could he not spile? could we not spile? could you not spile? could they not spile?	could I not be spiling? could you not be spiling? could he not be spiling? could we not be spiling? could you not be spiling? could they not be spiling?
Perfect	V-ing perfect
could I not have spiled? could you not have spiled? could he not have spiled? could we not have spiled? could you not have spiled? could they not have spiled?	could I not have been spiling? could you not have been spiling? could he not have been spiling? could we not have been spiling? could you not have been spiling? could they not have been spiling?