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 couldn't spile you couldn't spile he couldn't spile we couldn't spile you couldn't spile they couldn't spile	I couldn't be spiling you couldn't be spiling he couldn't be spiling we couldn't be spiling you couldn't be spiling they couldn't be spiling
Perfect	V-ing perfect
I couldn't have spiled you couldn't have spiled he couldn't have spiled we couldn't have spiled you couldn't have spiled they couldn't have spiled	I couldn't have been spiling you couldn't have been spiling he couldn't have been spiling we couldn't have been spiling you couldn't have been spiling they couldn't 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
couldn't I spile? couldn't you spile? couldn't he spile? couldn't we spile? couldn't you spile? couldn't they spile?	couldn't I be spiling? couldn't you be spiling? couldn't he be spiling? couldn't we be spiling? couldn't you be spiling? couldn't they be spiling?
Perfect	V-ing perfect
couldn't I have spiled? couldn't you have spiled? couldn't he have spiled? couldn't we have spiled? couldn't you have spiled? couldn't they have spiled?	couldn't I have been spiling? couldn't you have been spiling? couldn't he have been spiling? couldn't we have been spiling? couldn't you have been spiling? couldn't they have been spiling?