must tranquillise
Regular verb: tranquillise - tranquillised- tranquillised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must tranquillise
you must tranquillise
he must tranquillise
we must tranquillise
you must tranquillise
they must tranquillise 	I must be tranquillising
you must be tranquillising
he must be tranquillising
we must be tranquillising
you must be tranquillising
they must be tranquillising	I must have tranquillised
you must have tranquillised
he must have tranquillised
we must have tranquillised
you must have tranquillised
they must have tranquillised	I must have been tranquillising
you must have been tranquillising
he must have been tranquillising
we must have been tranquillising
you must have been tranquillising
they must have been tranquillising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not tranquillise
you must not tranquillise
he must not tranquillise
we must not tranquillise
you must not tranquillise
they must not tranquillise 	I must not be tranquillising
you must not be tranquillising
he must not be tranquillising
we must not be tranquillising
you must not be tranquillising
they must not be tranquillising	I must not have tranquillised
you must not have tranquillised
he must not have tranquillised
we must not have tranquillised
you must not have tranquillised
they must not have tranquillised	I must not have been tranquillising
you must not have been tranquillising
he must not have been tranquillising
we must not have been tranquillising
you must not have been tranquillising
they must not have been tranquillising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I tranquillise?
must you tranquillise?
must he tranquillise?
must we tranquillise?
must you tranquillise?
must they tranquillise? 	must I be tranquillising?
must you be tranquillising?
must he be tranquillising?
must we be tranquillising?
must you be tranquillising?
must they be tranquillising? 	must I have tranquillised?
must you have tranquillised?
must he have tranquillised?
must we have tranquillised?
must you have tranquillised?
must they have tranquillised? 	must I have been tranquillising?
must you have been tranquillising?
must he have been tranquillising?
must we have been tranquillising?
must you have been tranquillising?
must they have been tranquillising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not tranquillise?
must you not tranquillise?
must he not tranquillise?
must we not tranquillise?
must you not tranquillise?
must they not tranquillise? 	must I not be tranquillising?
must you not be tranquillising?
must he not be tranquillising?
must we not be tranquillising?
must you not be tranquillising?
must they not be tranquillising? 	must I not have tranquillised?
must you not have tranquillised?
must he not have tranquillised?
must we not have tranquillised?
must you not have tranquillised?
must they not have tranquillised? 	must I not have been tranquillising?
must you not have been tranquillising?
must he not have been tranquillising?
must we not have been tranquillising?
must you not have been tranquillising?
must they not have been tranquillising?