English verb conjugation
COULD SOIL

Regular verb: soil - soiled - soiled

Affirmation

Simple form	V-ing form
I could soil you could soil he could soil we could soil you could soil they could soil	I could be soiling you could be soiling he could be soiling we could be soiling you could be soiling they could be soiling
Perfect	V-ing perfect
I could have soiled you could have soiled he could have soiled we could have soiled you could have soiled they could have soiled	I could have been soiling you could have been soiling he could have been soiling we could have been soiling you could have been soiling they could have been soiling

Negation

Simple form	V-ing form
I couldn't soil you couldn't soil he couldn't soil we couldn't soil you couldn't soil they couldn't soil	I couldn't be soiling you couldn't be soiling he couldn't be soiling we couldn't be soiling you couldn't be soiling they couldn't be soiling
Perfect	V-ing perfect
I couldn't have soiled you couldn't have soiled he couldn't have soiled we couldn't have soiled you couldn't have soiled they couldn't have soiled	I couldn't have been soiling you couldn't have been soiling he couldn't have been soiling we couldn't have been soiling you couldn't have been soiling they couldn't have been soiling

Interrogative form

Simple form	V-ing form
could I soil? could you soil? could he soil? could we soil? could you soil? could they soil?	could I be soiling? could you be soiling? could he be soiling? could we be soiling? could you be soiling? could they be soiling?
Perfect	V-ing perfect
could I have soiled? could you have soiled? could he have soiled? could we have soiled? could you have soiled? could they have soiled?	could I have been soiling? could you have been soiling? could he have been soiling? could we have been soiling? could you have been soiling? could they have been soiling?

Interro-negative form

Simple form	V-ing form
couldn't I soil? couldn't you soil? couldn't he soil? couldn't we soil? couldn't you soil? couldn't they soil?	couldn't I be soiling? couldn't you be soiling? couldn't he be soiling? couldn't we be soiling? couldn't you be soiling? couldn't they be soiling?
Perfect	V-ing perfect
couldn't I have soiled? couldn't you have soiled? couldn't he have soiled? couldn't we have soiled? couldn't you have soiled? couldn't they have soiled?	couldn't I have been soiling? couldn't you have been soiling? couldn't he have been soiling? couldn't we have been soiling? couldn't you have been soiling? couldn't they have been soiling?