should synthesise
Regular verb: synthesise - synthesised- synthesised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd synthesise
you'd synthesise
he'd synthesise
we'd synthesise
you'd synthesise
they'd synthesise 	I'd be synthesising
you'd be synthesising
he'd be synthesising
we'd be synthesising
you'd be synthesising
they'd be synthesising	I should've synthesised
you should've synthesised
he should've synthesised
we should've synthesised
you should've synthesised
they should've synthesised	I should've been synthesising
you should've been synthesising
he should've been synthesising
we should've been synthesising
you should've been synthesising
they should've been synthesising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't synthesise
you shouldn't synthesise
he shouldn't synthesise
we shouldn't synthesise
you shouldn't synthesise
they shouldn't synthesise 	I shouldn't be synthesising
you shouldn't be synthesising
he shouldn't be synthesising
we shouldn't be synthesising
you shouldn't be synthesising
they shouldn't be synthesising	I shouldn't have synthesised
you shouldn't have synthesised
he shouldn't have synthesised
we shouldn't have synthesised
you shouldn't have synthesised
they shouldn't have synthesised	I shouldn't have been synthesising
you shouldn't have been synthesising
he shouldn't have been synthesising
we shouldn't have been synthesising
you shouldn't have been synthesising
they shouldn't have been synthesising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I synthesise?
should you synthesise?
should he synthesise?
should we synthesise?
should you synthesise?
should they synthesise? 	should I be synthesising?
should you be synthesising?
should he be synthesising?
should we be synthesising?
should you be synthesising?
should they be synthesising? 	should I have synthesised?
should you have synthesised?
should he have synthesised?
should we have synthesised?
should you have synthesised?
should they have synthesised? 	should I have been synthesising?
should you have been synthesising?
should he have been synthesising?
should we have been synthesising?
should you have been synthesising?
should they have been synthesising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I synthesise?
shouldn't you synthesise?
shouldn't he synthesise?
shouldn't we synthesise?
shouldn't you synthesise?
shouldn't they synthesise? 	shouldn't I be synthesising?
shouldn't you be synthesising?
shouldn't he be synthesising?
shouldn't we be synthesising?
shouldn't you be synthesising?
shouldn't they be synthesising? 	shouldn't I have synthesised?
shouldn't you have synthesised?
shouldn't he have synthesised?
shouldn't we have synthesised?
shouldn't you have synthesised?
shouldn't they have synthesised? 	shouldn't I have been synthesising?
shouldn't you have been synthesising?
shouldn't he have been synthesising?
shouldn't we have been synthesising?
shouldn't you have been synthesising?
shouldn't they have been synthesising?