must photosynthesise
Regular verb: photosynthesise - photosynthesised- photosynthesised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must photosynthesise
you must photosynthesise
he must photosynthesise
we must photosynthesise
you must photosynthesise
they must photosynthesise 	I must be photosynthesising
you must be photosynthesising
he must be photosynthesising
we must be photosynthesising
you must be photosynthesising
they must be photosynthesising	I must have photosynthesised
you must have photosynthesised
he must have photosynthesised
we must have photosynthesised
you must have photosynthesised
they must have photosynthesised	I must have been photosynthesising
you must have been photosynthesising
he must have been photosynthesising
we must have been photosynthesising
you must have been photosynthesising
they must have been photosynthesising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't photosynthesise
you mustn't photosynthesise
he mustn't photosynthesise
we mustn't photosynthesise
you mustn't photosynthesise
they mustn't photosynthesise 	I mustn't be photosynthesising
you mustn't be photosynthesising
he mustn't be photosynthesising
we mustn't be photosynthesising
you mustn't be photosynthesising
they mustn't be photosynthesising	I mustn't have photosynthesised
you mustn't have photosynthesised
he mustn't have photosynthesised
we mustn't have photosynthesised
you mustn't have photosynthesised
they mustn't have photosynthesised	I mustn't have been photosynthesising
you mustn't have been photosynthesising
he mustn't have been photosynthesising
we mustn't have been photosynthesising
you mustn't have been photosynthesising
they mustn't have been photosynthesising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I photosynthesise?
must you photosynthesise?
must he photosynthesise?
must we photosynthesise?
must you photosynthesise?
must they photosynthesise? 	must I be photosynthesising?
must you be photosynthesising?
must he be photosynthesising?
must we be photosynthesising?
must you be photosynthesising?
must they be photosynthesising? 	must I have photosynthesised?
must you have photosynthesised?
must he have photosynthesised?
must we have photosynthesised?
must you have photosynthesised?
must they have photosynthesised? 	must I have been photosynthesising?
must you have been photosynthesising?
must he have been photosynthesising?
must we have been photosynthesising?
must you have been photosynthesising?
must they have been photosynthesising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I photosynthesise?
mustn't you photosynthesise?
mustn't he photosynthesise?
mustn't we photosynthesise?
mustn't you photosynthesise?
mustn't they photosynthesise? 	mustn't I be photosynthesising?
mustn't you be photosynthesising?
mustn't he be photosynthesising?
mustn't we be photosynthesising?
mustn't you be photosynthesising?
mustn't they be photosynthesising? 	mustn't I have photosynthesised?
mustn't you have photosynthesised?
mustn't he have photosynthesised?
mustn't we have photosynthesised?
mustn't you have photosynthesised?
mustn't they have photosynthesised? 	mustn't I have been photosynthesising?
mustn't you have been photosynthesising?
mustn't he have been photosynthesising?
mustn't we have been photosynthesising?
mustn't you have been photosynthesising?
mustn't they have been photosynthesising?