could irritate
Regular verb: irritate - irritated- irritated

Affirmation 	
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I could irritate
you could irritate
he could irritate
we could irritate
you could irritate
they could irritate 	I could be irritating
you could be irritating
he could be irritating
we could be irritating
you could be irritating
they could be irritating	I could have irritated
you could have irritated
he could have irritated
we could have irritated
you could have irritated
they could have irritated	I could have been irritating
you could have been irritating
he could have been irritating
we could have been irritating
you could have been irritating
they could have been irritating	

Negation 	
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I couldn't irritate
you couldn't irritate
he couldn't irritate
we couldn't irritate
you couldn't irritate
they couldn't irritate 	I couldn't be irritating
you couldn't be irritating
he couldn't be irritating
we couldn't be irritating
you couldn't be irritating
they couldn't be irritating	I couldn't have irritated
you couldn't have irritated
he couldn't have irritated
we couldn't have irritated
you couldn't have irritated
they couldn't have irritated	I couldn't have been irritating
you couldn't have been irritating
he couldn't have been irritating
we couldn't have been irritating
you couldn't have been irritating
they couldn't have been irritating	

Interrogative form 	
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could I irritate?
could you irritate?
could he irritate?
could we irritate?
could you irritate?
could they irritate? 	could I be irritating?
could you be irritating?
could he be irritating?
could we be irritating?
could you be irritating?
could they be irritating? 	could I have irritated?
could you have irritated?
could he have irritated?
could we have irritated?
could you have irritated?
could they have irritated? 	could I have been irritating?
could you have been irritating?
could he have been irritating?
could we have been irritating?
could you have been irritating?
could they have been irritating? 	

Interro-negative form 	
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couldn't I irritate?
couldn't you irritate?
couldn't he irritate?
couldn't we irritate?
couldn't you irritate?
couldn't they irritate? 	couldn't I be irritating?
couldn't you be irritating?
couldn't he be irritating?
couldn't we be irritating?
couldn't you be irritating?
couldn't they be irritating? 	couldn't I have irritated?
couldn't you have irritated?
couldn't he have irritated?
couldn't we have irritated?
couldn't you have irritated?
couldn't they have irritated? 	couldn't I have been irritating?
couldn't you have been irritating?
couldn't he have been irritating?
couldn't we have been irritating?
couldn't you have been irritating?
couldn't they have been irritating?