could irritate
Regular verb: irritate - irritated- irritated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could irritate
you could irritate
she could irritate
we could irritate
you could irritate
they could irritate 	I could be irritating
you could be irritating
she could be irritating
we could be irritating
you could be irritating
they could be irritating	I could have irritated
you could have irritated
she 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
she could have been irritating
we could have been irritating
you could have been irritating
they could have been irritating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't irritate
you couldn't irritate
she 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
she 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
she 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
she 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 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I irritate?
could you irritate?
could she irritate?
could we irritate?
could you irritate?
could they irritate? 	could I be irritating?
could you be irritating?
could she be irritating?
could we be irritating?
could you be irritating?
could they be irritating? 	could I have irritated?
could you have irritated?
could she 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 she have been irritating?
could we have been irritating?
could you have been irritating?
could they have been irritating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I irritate?
couldn't you irritate?
couldn't she 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 she 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 she 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 she have been irritating?
couldn't we have been irritating?
couldn't you have been irritating?
couldn't they have been irritating?