could market
Regular verb: market - marketed- marketed

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