English verb conjugation
COULD MARKET

Regular verb: market - marketed - marketed

Affirmation

Simple form	V-ing form
I could market you could market he could market we could market you could market they could market	I could be marketing you could be marketing he could be marketing we could be marketing you could be marketing they could be marketing
Perfect	V-ing perfect
I could have marketed you could have marketed he could have marketed we could have marketed you could have marketed they could have marketed	I could have been marketing you could have been marketing he could have been marketing we could have been marketing you could have been marketing they could have been marketing

Negation

Simple form	V-ing form
I couldn't market you couldn't market he couldn't market we couldn't market you couldn't market they couldn't market	I couldn't be marketing you couldn't be marketing he couldn't be marketing we couldn't be marketing you couldn't be marketing they couldn't be marketing
Perfect	V-ing perfect
I couldn't have marketed you couldn't have marketed he couldn't have marketed we couldn't have marketed you couldn't have marketed they couldn't have marketed	I couldn't have been marketing you couldn't have been marketing he couldn't have been marketing we couldn't have been marketing you couldn't have been marketing they couldn't have been marketing

Interrogative form

Simple form	V-ing form
could I market? could you market? could he market? could we market? could you market? could they market?	could I be marketing? could you be marketing? could he be marketing? could we be marketing? could you be marketing? could they be marketing?
Perfect	V-ing perfect
could I have marketed? could you have marketed? could he have marketed? could we have marketed? could you have marketed? could they have marketed?	could I have been marketing? could you have been marketing? could he have been marketing? could we have been marketing? could you have been marketing? could they have been marketing?

Interro-negative form

Simple form	V-ing form
couldn't I market? couldn't you market? couldn't he market? couldn't we market? couldn't you market? couldn't they market?	couldn't I be marketing? couldn't you be marketing? couldn't he be marketing? couldn't we be marketing? couldn't you be marketing? couldn't they be marketing?
Perfect	V-ing perfect
couldn't I have marketed? couldn't you have marketed? couldn't he have marketed? couldn't we have marketed? couldn't you have marketed? couldn't they have marketed?	couldn't I have been marketing? couldn't you have been marketing? couldn't he have been marketing? couldn't we have been marketing? couldn't you have been marketing? couldn't they have been marketing?