should participate
Verbo regular: participate - participated- participated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'd participate
you'd participate
he'd participate
we'd participate
you'd participate
they'd participate 	I'd be participating
you'd be participating
he'd be participating
we'd be participating
you'd be participating
they'd be participating	I should've participated
you should've participated
he should've participated
we should've participated
you should've participated
they should've participated	I should've been participating
you should've been participating
he should've been participating
we should've been participating
you should've been participating
they should've been participating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shouldn't participate
you shouldn't participate
he shouldn't participate
we shouldn't participate
you shouldn't participate
they shouldn't participate 	I shouldn't be participating
you shouldn't be participating
he shouldn't be participating
we shouldn't be participating
you shouldn't be participating
they shouldn't be participating	I shouldn't have participated
you shouldn't have participated
he shouldn't have participated
we shouldn't have participated
you shouldn't have participated
they shouldn't have participated	I shouldn't have been participating
you shouldn't have been participating
he shouldn't have been participating
we shouldn't have been participating
you shouldn't have been participating
they shouldn't have been participating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I participate?
should you participate?
should he participate?
should we participate?
should you participate?
should they participate? 	should I be participating?
should you be participating?
should he be participating?
should we be participating?
should you be participating?
should they be participating? 	should I have participated?
should you have participated?
should he have participated?
should we have participated?
should you have participated?
should they have participated? 	should I have been participating?
should you have been participating?
should he have been participating?
should we have been participating?
should you have been participating?
should they have been participating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shouldn't I participate?
shouldn't you participate?
shouldn't he participate?
shouldn't we participate?
shouldn't you participate?
shouldn't they participate? 	shouldn't I be participating?
shouldn't you be participating?
shouldn't he be participating?
shouldn't we be participating?
shouldn't you be participating?
shouldn't they be participating? 	shouldn't I have participated?
shouldn't you have participated?
shouldn't he have participated?
shouldn't we have participated?
shouldn't you have participated?
shouldn't they have participated? 	shouldn't I have been participating?
shouldn't you have been participating?
shouldn't he have been participating?
shouldn't we have been participating?
shouldn't you have been participating?
shouldn't they have been participating?