should certificate
Verbo regular: certificate - certificated- certificated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should certificate
you should certificate
he should certificate
we should certificate
you should certificate
they should certificate 	I should be certificating
you should be certificating
he should be certificating
we should be certificating
you should be certificating
they should be certificating	I should have certificated
you should have certificated
he should have certificated
we should have certificated
you should have certificated
they should have certificated	I should have been certificating
you should have been certificating
he should have been certificating
we should have been certificating
you should have been certificating
they should have been certificating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not certificate
you should not certificate
he should not certificate
we should not certificate
you should not certificate
they should not certificate 	I should not be certificating
you should not be certificating
he should not be certificating
we should not be certificating
you should not be certificating
they should not be certificating	I should not have certificated
you should not have certificated
he should not have certificated
we should not have certificated
you should not have certificated
they should not have certificated	I should not have been certificating
you should not have been certificating
he should not have been certificating
we should not have been certificating
you should not have been certificating
they should not have been certificating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I certificate?
should you certificate?
should he certificate?
should we certificate?
should you certificate?
should they certificate? 	should I be certificating?
should you be certificating?
should he be certificating?
should we be certificating?
should you be certificating?
should they be certificating? 	should I have certificated?
should you have certificated?
should he have certificated?
should we have certificated?
should you have certificated?
should they have certificated? 	should I have been certificating?
should you have been certificating?
should he have been certificating?
should we have been certificating?
should you have been certificating?
should they have been certificating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not certificate?
should you not certificate?
should he not certificate?
should we not certificate?
should you not certificate?
should they not certificate? 	should I not be certificating?
should you not be certificating?
should he not be certificating?
should we not be certificating?
should you not be certificating?
should they not be certificating? 	should I not have certificated?
should you not have certificated?
should he not have certificated?
should we not have certificated?
should you not have certificated?
should they not have certificated? 	should I not have been certificating?
should you not have been certificating?
should he not have been certificating?
should we not have been certificating?
should you not have been certificating?
should they not have been certificating?