English verb conjugation
COULD THIEVE

Regular verb: thieve - thieved - thieved

Affirmation

Simple form	V-ing form
I could thieve you could thieve he could thieve we could thieve you could thieve they could thieve	I could be thieving you could be thieving he could be thieving we could be thieving you could be thieving they could be thieving
Perfect	V-ing perfect
I could have thieved you could have thieved he could have thieved we could have thieved you could have thieved they could have thieved	I could have been thieving you could have been thieving he could have been thieving we could have been thieving you could have been thieving they could have been thieving

Negation

Simple form	V-ing form
I couldn't thieve you couldn't thieve he couldn't thieve we couldn't thieve you couldn't thieve they couldn't thieve	I couldn't be thieving you couldn't be thieving he couldn't be thieving we couldn't be thieving you couldn't be thieving they couldn't be thieving
Perfect	V-ing perfect
I couldn't have thieved you couldn't have thieved he couldn't have thieved we couldn't have thieved you couldn't have thieved they couldn't have thieved	I couldn't have been thieving you couldn't have been thieving he couldn't have been thieving we couldn't have been thieving you couldn't have been thieving they couldn't have been thieving

Interrogative form

Simple form	V-ing form
could I thieve? could you thieve? could he thieve? could we thieve? could you thieve? could they thieve?	could I be thieving? could you be thieving? could he be thieving? could we be thieving? could you be thieving? could they be thieving?
Perfect	V-ing perfect
could I have thieved? could you have thieved? could he have thieved? could we have thieved? could you have thieved? could they have thieved?	could I have been thieving? could you have been thieving? could he have been thieving? could we have been thieving? could you have been thieving? could they have been thieving?

Interro-negative form

Simple form	V-ing form
couldn't I thieve? couldn't you thieve? couldn't he thieve? couldn't we thieve? couldn't you thieve? couldn't they thieve?	couldn't I be thieving? couldn't you be thieving? couldn't he be thieving? couldn't we be thieving? couldn't you be thieving? couldn't they be thieving?
Perfect	V-ing perfect
couldn't I have thieved? couldn't you have thieved? couldn't he have thieved? couldn't we have thieved? couldn't you have thieved? couldn't they have thieved?	couldn't I have been thieving? couldn't you have been thieving? couldn't he have been thieving? couldn't we have been thieving? couldn't you have been thieving? couldn't they have been thieving?