English verb conjugation
COULD OUTTHIEVE

Regular verb: outthieve - outthieved - outthieved

Affirmation

Simple form	V-ing form
I could outthieve you could outthieve she could outthieve we could outthieve you could outthieve they could outthieve	I could be outthieving you could be outthieving she could be outthieving we could be outthieving you could be outthieving they could be outthieving
Perfect	V-ing perfect
I could have outthieved you could have outthieved she could have outthieved we could have outthieved you could have outthieved they could have outthieved	I could have been outthieving you could have been outthieving she could have been outthieving we could have been outthieving you could have been outthieving they could have been outthieving

Negation

Simple form	V-ing form
I couldn't outthieve you couldn't outthieve she couldn't outthieve we couldn't outthieve you couldn't outthieve they couldn't outthieve	I couldn't be outthieving you couldn't be outthieving she couldn't be outthieving we couldn't be outthieving you couldn't be outthieving they couldn't be outthieving
Perfect	V-ing perfect
I couldn't have outthieved you couldn't have outthieved she couldn't have outthieved we couldn't have outthieved you couldn't have outthieved they couldn't have outthieved	I couldn't have been outthieving you couldn't have been outthieving she couldn't have been outthieving we couldn't have been outthieving you couldn't have been outthieving they couldn't have been outthieving

Interrogative form

Simple form	V-ing form
could I outthieve? could you outthieve? could she outthieve? could we outthieve? could you outthieve? could they outthieve?	could I be outthieving? could you be outthieving? could she be outthieving? could we be outthieving? could you be outthieving? could they be outthieving?
Perfect	V-ing perfect
could I have outthieved? could you have outthieved? could she have outthieved? could we have outthieved? could you have outthieved? could they have outthieved?	could I have been outthieving? could you have been outthieving? could she have been outthieving? could we have been outthieving? could you have been outthieving? could they have been outthieving?

Interro-negative form

Simple form	V-ing form
couldn't I outthieve? couldn't you outthieve? couldn't she outthieve? couldn't we outthieve? couldn't you outthieve? couldn't they outthieve?	couldn't I be outthieving? couldn't you be outthieving? couldn't she be outthieving? couldn't we be outthieving? couldn't you be outthieving? couldn't they be outthieving?
Perfect	V-ing perfect
couldn't I have outthieved? couldn't you have outthieved? couldn't she have outthieved? couldn't we have outthieved? couldn't you have outthieved? couldn't they have outthieved?	couldn't I have been outthieving? couldn't you have been outthieving? couldn't she have been outthieving? couldn't we have been outthieving? couldn't you have been outthieving? couldn't they have been outthieving?