must acclimatise
Regular verb: acclimatise - acclimatised- acclimatised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must acclimatise
you must acclimatise
he must acclimatise
we must acclimatise
you must acclimatise
they must acclimatise 	I must be acclimatising
you must be acclimatising
he must be acclimatising
we must be acclimatising
you must be acclimatising
they must be acclimatising	I must have acclimatised
you must have acclimatised
he must have acclimatised
we must have acclimatised
you must have acclimatised
they must have acclimatised	I must have been acclimatising
you must have been acclimatising
he must have been acclimatising
we must have been acclimatising
you must have been acclimatising
they must have been acclimatising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not acclimatise
you must not acclimatise
he must not acclimatise
we must not acclimatise
you must not acclimatise
they must not acclimatise 	I must not be acclimatising
you must not be acclimatising
he must not be acclimatising
we must not be acclimatising
you must not be acclimatising
they must not be acclimatising	I must not have acclimatised
you must not have acclimatised
he must not have acclimatised
we must not have acclimatised
you must not have acclimatised
they must not have acclimatised	I must not have been acclimatising
you must not have been acclimatising
he must not have been acclimatising
we must not have been acclimatising
you must not have been acclimatising
they must not have been acclimatising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I acclimatise?
must you acclimatise?
must he acclimatise?
must we acclimatise?
must you acclimatise?
must they acclimatise? 	must I be acclimatising?
must you be acclimatising?
must he be acclimatising?
must we be acclimatising?
must you be acclimatising?
must they be acclimatising? 	must I have acclimatised?
must you have acclimatised?
must he have acclimatised?
must we have acclimatised?
must you have acclimatised?
must they have acclimatised? 	must I have been acclimatising?
must you have been acclimatising?
must he have been acclimatising?
must we have been acclimatising?
must you have been acclimatising?
must they have been acclimatising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not acclimatise?
must you not acclimatise?
must he not acclimatise?
must we not acclimatise?
must you not acclimatise?
must they not acclimatise? 	must I not be acclimatising?
must you not be acclimatising?
must he not be acclimatising?
must we not be acclimatising?
must you not be acclimatising?
must they not be acclimatising? 	must I not have acclimatised?
must you not have acclimatised?
must he not have acclimatised?
must we not have acclimatised?
must you not have acclimatised?
must they not have acclimatised? 	must I not have been acclimatising?
must you not have been acclimatising?
must he not have been acclimatising?
must we not have been acclimatising?
must you not have been acclimatising?
must they not have been acclimatising?