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 couldn't sample
you couldn't sample
she couldn't sample
we couldn't sample
you couldn't sample
they couldn't sample 	I couldn't be sampling
you couldn't be sampling
she couldn't be sampling
we couldn't be sampling
you couldn't be sampling
they couldn't be sampling	I couldn't have sampled
you couldn't have sampled
she couldn't have sampled
we couldn't have sampled
you couldn't have sampled
they couldn't have sampled	I couldn't have been sampling
you couldn't have been sampling
she couldn't have been sampling
we couldn't have been sampling
you couldn't have been sampling
they couldn't 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 	
couldn't I sample?
couldn't you sample?
couldn't she sample?
couldn't we sample?
couldn't you sample?
couldn't they sample? 	couldn't I be sampling?
couldn't you be sampling?
couldn't she be sampling?
couldn't we be sampling?
couldn't you be sampling?
couldn't they be sampling? 	couldn't I have sampled?
couldn't you have sampled?
couldn't she have sampled?
couldn't we have sampled?
couldn't you have sampled?
couldn't they have sampled? 	couldn't I have been sampling?
couldn't you have been sampling?
couldn't she have been sampling?
couldn't we have been sampling?
couldn't you have been sampling?
couldn't they have been sampling?