must synonymise
Regular verb: synonymise - synonymised- synonymised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must synonymise
you must synonymise
he must synonymise
we must synonymise
you must synonymise
they must synonymise 	I must be synonymising
you must be synonymising
he must be synonymising
we must be synonymising
you must be synonymising
they must be synonymising	I must have synonymised
you must have synonymised
he must have synonymised
we must have synonymised
you must have synonymised
they must have synonymised	I must have been synonymising
you must have been synonymising
he must have been synonymising
we must have been synonymising
you must have been synonymising
they must have been synonymising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't synonymise
you mustn't synonymise
he mustn't synonymise
we mustn't synonymise
you mustn't synonymise
they mustn't synonymise 	I mustn't be synonymising
you mustn't be synonymising
he mustn't be synonymising
we mustn't be synonymising
you mustn't be synonymising
they mustn't be synonymising	I mustn't have synonymised
you mustn't have synonymised
he mustn't have synonymised
we mustn't have synonymised
you mustn't have synonymised
they mustn't have synonymised	I mustn't have been synonymising
you mustn't have been synonymising
he mustn't have been synonymising
we mustn't have been synonymising
you mustn't have been synonymising
they mustn't have been synonymising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I synonymise?
must you synonymise?
must he synonymise?
must we synonymise?
must you synonymise?
must they synonymise? 	must I be synonymising?
must you be synonymising?
must he be synonymising?
must we be synonymising?
must you be synonymising?
must they be synonymising? 	must I have synonymised?
must you have synonymised?
must he have synonymised?
must we have synonymised?
must you have synonymised?
must they have synonymised? 	must I have been synonymising?
must you have been synonymising?
must he have been synonymising?
must we have been synonymising?
must you have been synonymising?
must they have been synonymising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I synonymise?
mustn't you synonymise?
mustn't he synonymise?
mustn't we synonymise?
mustn't you synonymise?
mustn't they synonymise? 	mustn't I be synonymising?
mustn't you be synonymising?
mustn't he be synonymising?
mustn't we be synonymising?
mustn't you be synonymising?
mustn't they be synonymising? 	mustn't I have synonymised?
mustn't you have synonymised?
mustn't he have synonymised?
mustn't we have synonymised?
mustn't you have synonymised?
mustn't they have synonymised? 	mustn't I have been synonymising?
mustn't you have been synonymising?
mustn't he have been synonymising?
mustn't we have been synonymising?
mustn't you have been synonymising?
mustn't they have been synonymising?