English verb conjugation
COULD TOIL

Regular verb: toil - toiled - toiled

Affirmation

Simple form	V-ing form
I could toil you could toil he could toil we could toil you could toil they could toil	I could be toiling you could be toiling he could be toiling we could be toiling you could be toiling they could be toiling
Perfect	V-ing perfect
I could have toiled you could have toiled he could have toiled we could have toiled you could have toiled they could have toiled	I could have been toiling you could have been toiling he could have been toiling we could have been toiling you could have been toiling they could have been toiling

Negation

Simple form	V-ing form
I couldn't toil you couldn't toil he couldn't toil we couldn't toil you couldn't toil they couldn't toil	I couldn't be toiling you couldn't be toiling he couldn't be toiling we couldn't be toiling you couldn't be toiling they couldn't be toiling
Perfect	V-ing perfect
I couldn't have toiled you couldn't have toiled he couldn't have toiled we couldn't have toiled you couldn't have toiled they couldn't have toiled	I couldn't have been toiling you couldn't have been toiling he couldn't have been toiling we couldn't have been toiling you couldn't have been toiling they couldn't have been toiling

Interrogative form

Simple form	V-ing form
could I toil? could you toil? could he toil? could we toil? could you toil? could they toil?	could I be toiling? could you be toiling? could he be toiling? could we be toiling? could you be toiling? could they be toiling?
Perfect	V-ing perfect
could I have toiled? could you have toiled? could he have toiled? could we have toiled? could you have toiled? could they have toiled?	could I have been toiling? could you have been toiling? could he have been toiling? could we have been toiling? could you have been toiling? could they have been toiling?

Interro-negative form

Simple form	V-ing form
couldn't I toil? couldn't you toil? couldn't he toil? couldn't we toil? couldn't you toil? couldn't they toil?	couldn't I be toiling? couldn't you be toiling? couldn't he be toiling? couldn't we be toiling? couldn't you be toiling? couldn't they be toiling?
Perfect	V-ing perfect
couldn't I have toiled? couldn't you have toiled? couldn't he have toiled? couldn't we have toiled? couldn't you have toiled? couldn't they have toiled?	couldn't I have been toiling? couldn't you have been toiling? couldn't he have been toiling? couldn't we have been toiling? couldn't you have been toiling? couldn't they have been toiling?