could tranquilise
Regular verb: tranquilise - tranquilised- tranquilised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tranquilise
you could tranquilise
she could tranquilise
we could tranquilise
you could tranquilise
they could tranquilise 	I could be tranquilising
you could be tranquilising
she could be tranquilising
we could be tranquilising
you could be tranquilising
they could be tranquilising	I could have tranquilised
you could have tranquilised
she could have tranquilised
we could have tranquilised
you could have tranquilised
they could have tranquilised	I could have been tranquilising
you could have been tranquilising
she could have been tranquilising
we could have been tranquilising
you could have been tranquilising
they could have been tranquilising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tranquilise
you couldn't tranquilise
she couldn't tranquilise
we couldn't tranquilise
you couldn't tranquilise
they couldn't tranquilise 	I couldn't be tranquilising
you couldn't be tranquilising
she couldn't be tranquilising
we couldn't be tranquilising
you couldn't be tranquilising
they couldn't be tranquilising	I couldn't have tranquilised
you couldn't have tranquilised
she couldn't have tranquilised
we couldn't have tranquilised
you couldn't have tranquilised
they couldn't have tranquilised	I couldn't have been tranquilising
you couldn't have been tranquilising
she couldn't have been tranquilising
we couldn't have been tranquilising
you couldn't have been tranquilising
they couldn't have been tranquilising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tranquilise?
could you tranquilise?
could she tranquilise?
could we tranquilise?
could you tranquilise?
could they tranquilise? 	could I be tranquilising?
could you be tranquilising?
could she be tranquilising?
could we be tranquilising?
could you be tranquilising?
could they be tranquilising? 	could I have tranquilised?
could you have tranquilised?
could she have tranquilised?
could we have tranquilised?
could you have tranquilised?
could they have tranquilised? 	could I have been tranquilising?
could you have been tranquilising?
could she have been tranquilising?
could we have been tranquilising?
could you have been tranquilising?
could they have been tranquilising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tranquilise?
couldn't you tranquilise?
couldn't she tranquilise?
couldn't we tranquilise?
couldn't you tranquilise?
couldn't they tranquilise? 	couldn't I be tranquilising?
couldn't you be tranquilising?
couldn't she be tranquilising?
couldn't we be tranquilising?
couldn't you be tranquilising?
couldn't they be tranquilising? 	couldn't I have tranquilised?
couldn't you have tranquilised?
couldn't she have tranquilised?
couldn't we have tranquilised?
couldn't you have tranquilised?
couldn't they have tranquilised? 	couldn't I have been tranquilising?
couldn't you have been tranquilising?
couldn't she have been tranquilising?
couldn't we have been tranquilising?
couldn't you have been tranquilising?
couldn't they have been tranquilising?