could concatenate
Verbe régulier : concatenate - concatenated- concatenated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could concatenate
you could concatenate
he could concatenate
we could concatenate
you could concatenate
they could concatenate 	I could be concatenating
you could be concatenating
he could be concatenating
we could be concatenating
you could be concatenating
they could be concatenating	I could have concatenated
you could have concatenated
he could have concatenated
we could have concatenated
you could have concatenated
they could have concatenated	I could have been concatenating
you could have been concatenating
he could have been concatenating
we could have been concatenating
you could have been concatenating
they could have been concatenating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't concatenate
you couldn't concatenate
he couldn't concatenate
we couldn't concatenate
you couldn't concatenate
they couldn't concatenate 	I couldn't be concatenating
you couldn't be concatenating
he couldn't be concatenating
we couldn't be concatenating
you couldn't be concatenating
they couldn't be concatenating	I couldn't have concatenated
you couldn't have concatenated
he couldn't have concatenated
we couldn't have concatenated
you couldn't have concatenated
they couldn't have concatenated	I couldn't have been concatenating
you couldn't have been concatenating
he couldn't have been concatenating
we couldn't have been concatenating
you couldn't have been concatenating
they couldn't have been concatenating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I concatenate?
could you concatenate?
could he concatenate?
could we concatenate?
could you concatenate?
could they concatenate? 	could I be concatenating?
could you be concatenating?
could he be concatenating?
could we be concatenating?
could you be concatenating?
could they be concatenating? 	could I have concatenated?
could you have concatenated?
could he have concatenated?
could we have concatenated?
could you have concatenated?
could they have concatenated? 	could I have been concatenating?
could you have been concatenating?
could he have been concatenating?
could we have been concatenating?
could you have been concatenating?
could they have been concatenating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I concatenate?
couldn't you concatenate?
couldn't he concatenate?
couldn't we concatenate?
couldn't you concatenate?
couldn't they concatenate? 	couldn't I be concatenating?
couldn't you be concatenating?
couldn't he be concatenating?
couldn't we be concatenating?
couldn't you be concatenating?
couldn't they be concatenating? 	couldn't I have concatenated?
couldn't you have concatenated?
couldn't he have concatenated?
couldn't we have concatenated?
couldn't you have concatenated?
couldn't they have concatenated? 	couldn't I have been concatenating?
couldn't you have been concatenating?
couldn't he have been concatenating?
couldn't we have been concatenating?
couldn't you have been concatenating?
couldn't they have been concatenating?