English verb conjugation
COULD SPOIL

Irregular verb: spoil - spoiled, spoilt - spoiled, spoilt

Affirmation

Simple form	V-ing form
I could spoil you could spoil he could spoil we could spoil you could spoil they could spoil	I could be spoiling you could be spoiling he could be spoiling we could be spoiling you could be spoiling they could be spoiling
Perfect	V-ing perfect
I could have spoiled, spoilt you could have spoiled, spoilt he could have spoiled, spoilt we could have spoiled, spoilt you could have spoiled, spoilt they could have spoiled, spoilt	I could have been spoiling you could have been spoiling he could have been spoiling we could have been spoiling you could have been spoiling they could have been spoiling

Negation

Simple form	V-ing form
I couldn't spoil you couldn't spoil he couldn't spoil we couldn't spoil you couldn't spoil they couldn't spoil	I couldn't be spoiling you couldn't be spoiling he couldn't be spoiling we couldn't be spoiling you couldn't be spoiling they couldn't be spoiling
Perfect	V-ing perfect
I couldn't have spoiled, spoilt you couldn't have spoiled, spoilt he couldn't have spoiled, spoilt we couldn't have spoiled, spoilt you couldn't have spoiled, spoilt they couldn't have spoiled, spoilt	I couldn't have been spoiling you couldn't have been spoiling he couldn't have been spoiling we couldn't have been spoiling you couldn't have been spoiling they couldn't have been spoiling

Interrogative form

Simple form	V-ing form
could I spoil? could you spoil? could he spoil? could we spoil? could you spoil? could they spoil?	could I be spoiling? could you be spoiling? could he be spoiling? could we be spoiling? could you be spoiling? could they be spoiling?
Perfect	V-ing perfect
could I have spoiled, spoilt? could you have spoiled, spoilt? could he have spoiled, spoilt? could we have spoiled, spoilt? could you have spoiled, spoilt? could they have spoiled, spoilt?	could I have been spoiling? could you have been spoiling? could he have been spoiling? could we have been spoiling? could you have been spoiling? could they have been spoiling?

Interro-negative form

Simple form	V-ing form
couldn't I spoil? couldn't you spoil? couldn't he spoil? couldn't we spoil? couldn't you spoil? couldn't they spoil?	couldn't I be spoiling? couldn't you be spoiling? couldn't he be spoiling? couldn't we be spoiling? couldn't you be spoiling? couldn't they be spoiling?
Perfect	V-ing perfect
couldn't I have spoiled, spoilt? couldn't you have spoiled, spoilt? couldn't he have spoiled, spoilt? couldn't we have spoiled, spoilt? couldn't you have spoiled, spoilt? couldn't they have spoiled, spoilt?	couldn't I have been spoiling? couldn't you have been spoiling? couldn't he have been spoiling? couldn't we have been spoiling? couldn't you have been spoiling? couldn't they have been spoiling?