English verb conjugation
COULD SOIL

Regular verb: soil - soiled - soiled

Affirmation

Simple form	V-ing form
I could soil you could soil she could soil we could soil you could soil they could soil	I could be soiling you could be soiling she 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 she 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 she 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 she 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 she 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 she 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 she 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 she soil? could we soil? could you soil? could they soil?	could I be soiling? could you be soiling? could she 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 she 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 she 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 she 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 she 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 she 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 she have been soiling? couldn't we have been soiling? couldn't you have been soiling? couldn't they have been soiling?