could authorise
Regular verb: authorise - authorised- authorised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could authorise
you could authorise
she could authorise
we could authorise
you could authorise
they could authorise 	I could be authorising
you could be authorising
she could be authorising
we could be authorising
you could be authorising
they could be authorising	I could have authorised
you could have authorised
she could have authorised
we could have authorised
you could have authorised
they could have authorised	I could have been authorising
you could have been authorising
she could have been authorising
we could have been authorising
you could have been authorising
they could have been authorising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't authorise
you couldn't authorise
she couldn't authorise
we couldn't authorise
you couldn't authorise
they couldn't authorise 	I couldn't be authorising
you couldn't be authorising
she couldn't be authorising
we couldn't be authorising
you couldn't be authorising
they couldn't be authorising	I couldn't have authorised
you couldn't have authorised
she couldn't have authorised
we couldn't have authorised
you couldn't have authorised
they couldn't have authorised	I couldn't have been authorising
you couldn't have been authorising
she couldn't have been authorising
we couldn't have been authorising
you couldn't have been authorising
they couldn't have been authorising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I authorise?
could you authorise?
could she authorise?
could we authorise?
could you authorise?
could they authorise? 	could I be authorising?
could you be authorising?
could she be authorising?
could we be authorising?
could you be authorising?
could they be authorising? 	could I have authorised?
could you have authorised?
could she have authorised?
could we have authorised?
could you have authorised?
could they have authorised? 	could I have been authorising?
could you have been authorising?
could she have been authorising?
could we have been authorising?
could you have been authorising?
could they have been authorising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I authorise?
couldn't you authorise?
couldn't she authorise?
couldn't we authorise?
couldn't you authorise?
couldn't they authorise? 	couldn't I be authorising?
couldn't you be authorising?
couldn't she be authorising?
couldn't we be authorising?
couldn't you be authorising?
couldn't they be authorising? 	couldn't I have authorised?
couldn't you have authorised?
couldn't she have authorised?
couldn't we have authorised?
couldn't you have authorised?
couldn't they have authorised? 	couldn't I have been authorising?
couldn't you have been authorising?
couldn't she have been authorising?
couldn't we have been authorising?
couldn't you have been authorising?
couldn't they have been authorising?