should participate
Verbo regular: participate - participated- participated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should participate
you should participate
she should participate
we should participate
you should participate
they should participate 	I should be participating
you should be participating
she should be participating
we should be participating
you should be participating
they should be participating	I should have participated
you should have participated
she should have participated
we should have participated
you should have participated
they should have participated	I should have been participating
you should have been participating
she should have been participating
we should have been participating
you should have been participating
they should have been participating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not participate
you should not participate
she should not participate
we should not participate
you should not participate
they should not participate 	I should not be participating
you should not be participating
she should not be participating
we should not be participating
you should not be participating
they should not be participating	I should not have participated
you should not have participated
she should not have participated
we should not have participated
you should not have participated
they should not have participated	I should not have been participating
you should not have been participating
she should not have been participating
we should not have been participating
you should not have been participating
they should not have been participating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I participate?
should you participate?
should she participate?
should we participate?
should you participate?
should they participate? 	should I be participating?
should you be participating?
should she be participating?
should we be participating?
should you be participating?
should they be participating? 	should I have participated?
should you have participated?
should she 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 she 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 	
should I not participate?
should you not participate?
should she not participate?
should we not participate?
should you not participate?
should they not participate? 	should I not be participating?
should you not be participating?
should she not be participating?
should we not be participating?
should you not be participating?
should they not be participating? 	should I not have participated?
should you not have participated?
should she not have participated?
should we not have participated?
should you not have participated?
should they not have participated? 	should I not have been participating?
should you not have been participating?
should she not have been participating?
should we not have been participating?
should you not have been participating?
should they not have been participating?