could annotate
Regular verb: annotate - annotated- annotated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could annotate
you could annotate
he could annotate
we could annotate
you could annotate
they could annotate 	I could be annotating
you could be annotating
he could be annotating
we could be annotating
you could be annotating
they could be annotating	I could have annotated
you could have annotated
he could have annotated
we could have annotated
you could have annotated
they could have annotated	I could have been annotating
you could have been annotating
he could have been annotating
we could have been annotating
you could have been annotating
they could have been annotating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't annotate
you couldn't annotate
he couldn't annotate
we couldn't annotate
you couldn't annotate
they couldn't annotate 	I couldn't be annotating
you couldn't be annotating
he couldn't be annotating
we couldn't be annotating
you couldn't be annotating
they couldn't be annotating	I couldn't have annotated
you couldn't have annotated
he couldn't have annotated
we couldn't have annotated
you couldn't have annotated
they couldn't have annotated	I couldn't have been annotating
you couldn't have been annotating
he couldn't have been annotating
we couldn't have been annotating
you couldn't have been annotating
they couldn't have been annotating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I annotate?
could you annotate?
could he annotate?
could we annotate?
could you annotate?
could they annotate? 	could I be annotating?
could you be annotating?
could he be annotating?
could we be annotating?
could you be annotating?
could they be annotating? 	could I have annotated?
could you have annotated?
could he have annotated?
could we have annotated?
could you have annotated?
could they have annotated? 	could I have been annotating?
could you have been annotating?
could he have been annotating?
could we have been annotating?
could you have been annotating?
could they have been annotating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I annotate?
couldn't you annotate?
couldn't he annotate?
couldn't we annotate?
couldn't you annotate?
couldn't they annotate? 	couldn't I be annotating?
couldn't you be annotating?
couldn't he be annotating?
couldn't we be annotating?
couldn't you be annotating?
couldn't they be annotating? 	couldn't I have annotated?
couldn't you have annotated?
couldn't he have annotated?
couldn't we have annotated?
couldn't you have annotated?
couldn't they have annotated? 	couldn't I have been annotating?
couldn't you have been annotating?
couldn't he have been annotating?
couldn't we have been annotating?
couldn't you have been annotating?
couldn't they have been annotating?