could compute
Verbo regular: compute - computed- computed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could compute
you could compute
she could compute
we could compute
you could compute
they could compute 	I could be computing
you could be computing
she could be computing
we could be computing
you could be computing
they could be computing	I could have computed
you could have computed
she could have computed
we could have computed
you could have computed
they could have computed	I could have been computing
you could have been computing
she could have been computing
we could have been computing
you could have been computing
they could have been computing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't compute
you couldn't compute
she couldn't compute
we couldn't compute
you couldn't compute
they couldn't compute 	I couldn't be computing
you couldn't be computing
she couldn't be computing
we couldn't be computing
you couldn't be computing
they couldn't be computing	I couldn't have computed
you couldn't have computed
she couldn't have computed
we couldn't have computed
you couldn't have computed
they couldn't have computed	I couldn't have been computing
you couldn't have been computing
she couldn't have been computing
we couldn't have been computing
you couldn't have been computing
they couldn't have been computing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I compute?
could you compute?
could she compute?
could we compute?
could you compute?
could they compute? 	could I be computing?
could you be computing?
could she be computing?
could we be computing?
could you be computing?
could they be computing? 	could I have computed?
could you have computed?
could she have computed?
could we have computed?
could you have computed?
could they have computed? 	could I have been computing?
could you have been computing?
could she have been computing?
could we have been computing?
could you have been computing?
could they have been computing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I compute?
couldn't you compute?
couldn't she compute?
couldn't we compute?
couldn't you compute?
couldn't they compute? 	couldn't I be computing?
couldn't you be computing?
couldn't she be computing?
couldn't we be computing?
couldn't you be computing?
couldn't they be computing? 	couldn't I have computed?
couldn't you have computed?
couldn't she have computed?
couldn't we have computed?
couldn't you have computed?
couldn't they have computed? 	couldn't I have been computing?
couldn't you have been computing?
couldn't she have been computing?
couldn't we have been computing?
couldn't you have been computing?
couldn't they have been computing?