could title
Regular verb: title - titled- titled

Affirmation 	
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I could title
you could title
she could title
we could title
you could title
they could title 	I could be titling
you could be titling
she could be titling
we could be titling
you could be titling
they could be titling	I could have titled
you could have titled
she could have titled
we could have titled
you could have titled
they could have titled	I could have been titling
you could have been titling
she could have been titling
we could have been titling
you could have been titling
they could have been titling	

Negation 	
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I couldn't title
you couldn't title
she couldn't title
we couldn't title
you couldn't title
they couldn't title 	I couldn't be titling
you couldn't be titling
she couldn't be titling
we couldn't be titling
you couldn't be titling
they couldn't be titling	I couldn't have titled
you couldn't have titled
she couldn't have titled
we couldn't have titled
you couldn't have titled
they couldn't have titled	I couldn't have been titling
you couldn't have been titling
she couldn't have been titling
we couldn't have been titling
you couldn't have been titling
they couldn't have been titling	

Interrogative form 	
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could I title?
could you title?
could she title?
could we title?
could you title?
could they title? 	could I be titling?
could you be titling?
could she be titling?
could we be titling?
could you be titling?
could they be titling? 	could I have titled?
could you have titled?
could she have titled?
could we have titled?
could you have titled?
could they have titled? 	could I have been titling?
could you have been titling?
could she have been titling?
could we have been titling?
could you have been titling?
could they have been titling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I title?
couldn't you title?
couldn't she title?
couldn't we title?
couldn't you title?
couldn't they title? 	couldn't I be titling?
couldn't you be titling?
couldn't she be titling?
couldn't we be titling?
couldn't you be titling?
couldn't they be titling? 	couldn't I have titled?
couldn't you have titled?
couldn't she have titled?
couldn't we have titled?
couldn't you have titled?
couldn't they have titled? 	couldn't I have been titling?
couldn't you have been titling?
couldn't she have been titling?
couldn't we have been titling?
couldn't you have been titling?
couldn't they have been titling?