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