Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could flea market you could flea market she could flea market we could flea market you could flea market they could flea market
V-ing form
I could be flea marketing you could be flea marketing she could be flea marketing we could be flea marketing you could be flea marketing they could be flea marketing
Perfect
I could have flea marketed you could have flea marketed she could have flea marketed we could have flea marketed you could have flea marketed they could have flea marketed
V-ing perfect
I could have been flea marketing you could have been flea marketing she could have been flea marketing we could have been flea marketing you could have been flea marketing they could have been flea marketing
Negation
Simple form
I could not flea market you could not flea market she could not flea market we could not flea market you could not flea market they could not flea market
V-ing form
I could not be flea marketing you could not be flea marketing she could not be flea marketing we could not be flea marketing you could not be flea marketing they could not be flea marketing
Perfect
I could not have flea marketed you could not have flea marketed she could not have flea marketed we could not have flea marketed you could not have flea marketed they could not have flea marketed
V-ing perfect
I could not have been flea marketing you could not have been flea marketing she could not have been flea marketing we could not have been flea marketing you could not have been flea marketing they could not have been flea marketing
Interrogative form
Simple form
could I flea market? could you flea market? could she flea market? could we flea market? could you flea market? could they flea market?
V-ing form
could I be flea marketing? could you be flea marketing? could she be flea marketing? could we be flea marketing? could you be flea marketing? could they be flea marketing?
Perfect
could I have flea marketed? could you have flea marketed? could she have flea marketed? could we have flea marketed? could you have flea marketed? could they have flea marketed?
V-ing perfect
could I have been flea marketing? could you have been flea marketing? could she have been flea marketing? could we have been flea marketing? could you have been flea marketing? could they have been flea marketing?
Interro-negative form
Simple form
could I not flea market? could you not flea market? could she not flea market? could we not flea market? could you not flea market? could they not flea market?
V-ing form
could I not be flea marketing? could you not be flea marketing? could she not be flea marketing? could we not be flea marketing? could you not be flea marketing? could they not be flea marketing?
Perfect
could I not have flea marketed? could you not have flea marketed? could she not have flea marketed? could we not have flea marketed? could you not have flea marketed? could they not have flea marketed?
V-ing perfect
could I not have been flea marketing? could you not have been flea marketing? could she not have been flea marketing? could we not have been flea marketing? could you not have been flea marketing? could they not have been flea marketing?