could sample
Verbo regular: sample - sampled- sampled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sample
you could sample
she could sample
we could sample
you could sample
they could sample 	I could be sampling
you could be sampling
she could be sampling
we could be sampling
you could be sampling
they could be sampling	I could have sampled
you could have sampled
she could have sampled
we could have sampled
you could have sampled
they could have sampled	I could have been sampling
you could have been sampling
she could have been sampling
we could have been sampling
you could have been sampling
they could have been sampling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not sample
you could not sample
she could not sample
we could not sample
you could not sample
they could not sample 	I could not be sampling
you could not be sampling
she could not be sampling
we could not be sampling
you could not be sampling
they could not be sampling	I could not have sampled
you could not have sampled
she could not have sampled
we could not have sampled
you could not have sampled
they could not have sampled	I could not have been sampling
you could not have been sampling
she could not have been sampling
we could not have been sampling
you could not have been sampling
they could not have been sampling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sample?
could you sample?
could she sample?
could we sample?
could you sample?
could they sample? 	could I be sampling?
could you be sampling?
could she be sampling?
could we be sampling?
could you be sampling?
could they be sampling? 	could I have sampled?
could you have sampled?
could she have sampled?
could we have sampled?
could you have sampled?
could they have sampled? 	could I have been sampling?
could you have been sampling?
could she have been sampling?
could we have been sampling?
could you have been sampling?
could they have been sampling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not sample?
could you not sample?
could she not sample?
could we not sample?
could you not sample?
could they not sample? 	could I not be sampling?
could you not be sampling?
could she not be sampling?
could we not be sampling?
could you not be sampling?
could they not be sampling? 	could I not have sampled?
could you not have sampled?
could she not have sampled?
could we not have sampled?
could you not have sampled?
could they not have sampled? 	could I not have been sampling?
could you not have been sampling?
could she not have been sampling?
could we not have been sampling?
could you not have been sampling?
could they not have been sampling?