can investigate
Verbo regular: investigate - investigated- investigated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can investigate
you can investigate
she can investigate
we can investigate
you can investigate
they can investigate 	I can be investigating
you can be investigating
she can be investigating
we can be investigating
you can be investigating
they can be investigating	I can have investigated
you can have investigated
she can have investigated
we can have investigated
you can have investigated
they can have investigated	I can have been investigating
you can have been investigating
she can have been investigating
we can have been investigating
you can have been investigating
they can have been investigating	

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

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

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