could dateline
Regular verb: dateline - datelined- datelined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dateline
you could dateline
he could dateline
we could dateline
you could dateline
they could dateline 	I could be datelining
you could be datelining
he could be datelining
we could be datelining
you could be datelining
they could be datelining	I could have datelined
you could have datelined
he could have datelined
we could have datelined
you could have datelined
they could have datelined	I could have been datelining
you could have been datelining
he could have been datelining
we could have been datelining
you could have been datelining
they could have been datelining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't dateline
you couldn't dateline
he couldn't dateline
we couldn't dateline
you couldn't dateline
they couldn't dateline 	I couldn't be datelining
you couldn't be datelining
he couldn't be datelining
we couldn't be datelining
you couldn't be datelining
they couldn't be datelining	I couldn't have datelined
you couldn't have datelined
he couldn't have datelined
we couldn't have datelined
you couldn't have datelined
they couldn't have datelined	I couldn't have been datelining
you couldn't have been datelining
he couldn't have been datelining
we couldn't have been datelining
you couldn't have been datelining
they couldn't have been datelining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dateline?
could you dateline?
could he dateline?
could we dateline?
could you dateline?
could they dateline? 	could I be datelining?
could you be datelining?
could he be datelining?
could we be datelining?
could you be datelining?
could they be datelining? 	could I have datelined?
could you have datelined?
could he have datelined?
could we have datelined?
could you have datelined?
could they have datelined? 	could I have been datelining?
could you have been datelining?
could he have been datelining?
could we have been datelining?
could you have been datelining?
could they have been datelining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I dateline?
couldn't you dateline?
couldn't he dateline?
couldn't we dateline?
couldn't you dateline?
couldn't they dateline? 	couldn't I be datelining?
couldn't you be datelining?
couldn't he be datelining?
couldn't we be datelining?
couldn't you be datelining?
couldn't they be datelining? 	couldn't I have datelined?
couldn't you have datelined?
couldn't he have datelined?
couldn't we have datelined?
couldn't you have datelined?
couldn't they have datelined? 	couldn't I have been datelining?
couldn't you have been datelining?
couldn't he have been datelining?
couldn't we have been datelining?
couldn't you have been datelining?
couldn't they have been datelining?