should investigate
Verbo regular: investigate - investigated- investigated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'd investigate
you'd investigate
he'd investigate
we'd investigate
you'd investigate
they'd investigate 	I'd be investigating
you'd be investigating
he'd be investigating
we'd be investigating
you'd be investigating
they'd be investigating	I should've investigated
you should've investigated
he should've investigated
we should've investigated
you should've investigated
they should've investigated	I should've been investigating
you should've been investigating
he should've been investigating
we should've been investigating
you should've been investigating
they should've been investigating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shouldn't investigate
you shouldn't investigate
he shouldn't investigate
we shouldn't investigate
you shouldn't investigate
they shouldn't investigate 	I shouldn't be investigating
you shouldn't be investigating
he shouldn't be investigating
we shouldn't be investigating
you shouldn't be investigating
they shouldn't be investigating	I shouldn't have investigated
you shouldn't have investigated
he shouldn't have investigated
we shouldn't have investigated
you shouldn't have investigated
they shouldn't have investigated	I shouldn't have been investigating
you shouldn't have been investigating
he shouldn't have been investigating
we shouldn't have been investigating
you shouldn't have been investigating
they shouldn't have been investigating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I investigate?
should you investigate?
should he investigate?
should we investigate?
should you investigate?
should they investigate? 	should I be investigating?
should you be investigating?
should he be investigating?
should we be investigating?
should you be investigating?
should they be investigating? 	should I have investigated?
should you have investigated?
should he have investigated?
should we have investigated?
should you have investigated?
should they have investigated? 	should I have been investigating?
should you have been investigating?
should he have been investigating?
should we have been investigating?
should you have been investigating?
should they have been investigating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shouldn't I investigate?
shouldn't you investigate?
shouldn't he investigate?
shouldn't we investigate?
shouldn't you investigate?
shouldn't they investigate? 	shouldn't I be investigating?
shouldn't you be investigating?
shouldn't he be investigating?
shouldn't we be investigating?
shouldn't you be investigating?
shouldn't they be investigating? 	shouldn't I have investigated?
shouldn't you have investigated?
shouldn't he have investigated?
shouldn't we have investigated?
shouldn't you have investigated?
shouldn't they have investigated? 	shouldn't I have been investigating?
shouldn't you have been investigating?
shouldn't he have been investigating?
shouldn't we have been investigating?
shouldn't you have been investigating?
shouldn't they have been investigating?