could overestimate
Verbo regular: overestimate - overestimated- overestimated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could overestimate
you could overestimate
he could overestimate
we could overestimate
you could overestimate
they could overestimate 	I could be overestimating
you could be overestimating
he could be overestimating
we could be overestimating
you could be overestimating
they could be overestimating	I could have overestimated
you could have overestimated
he could have overestimated
we could have overestimated
you could have overestimated
they could have overestimated	I could have been overestimating
you could have been overestimating
he could have been overestimating
we could have been overestimating
you could have been overestimating
they could have been overestimating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not overestimate
you could not overestimate
he could not overestimate
we could not overestimate
you could not overestimate
they could not overestimate 	I could not be overestimating
you could not be overestimating
he could not be overestimating
we could not be overestimating
you could not be overestimating
they could not be overestimating	I could not have overestimated
you could not have overestimated
he could not have overestimated
we could not have overestimated
you could not have overestimated
they could not have overestimated	I could not have been overestimating
you could not have been overestimating
he could not have been overestimating
we could not have been overestimating
you could not have been overestimating
they could not have been overestimating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I overestimate?
could you overestimate?
could he overestimate?
could we overestimate?
could you overestimate?
could they overestimate? 	could I be overestimating?
could you be overestimating?
could he be overestimating?
could we be overestimating?
could you be overestimating?
could they be overestimating? 	could I have overestimated?
could you have overestimated?
could he have overestimated?
could we have overestimated?
could you have overestimated?
could they have overestimated? 	could I have been overestimating?
could you have been overestimating?
could he have been overestimating?
could we have been overestimating?
could you have been overestimating?
could they have been overestimating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not overestimate?
could you not overestimate?
could he not overestimate?
could we not overestimate?
could you not overestimate?
could they not overestimate? 	could I not be overestimating?
could you not be overestimating?
could he not be overestimating?
could we not be overestimating?
could you not be overestimating?
could they not be overestimating? 	could I not have overestimated?
could you not have overestimated?
could he not have overestimated?
could we not have overestimated?
could you not have overestimated?
could they not have overestimated? 	could I not have been overestimating?
could you not have been overestimating?
could he not have been overestimating?
could we not have been overestimating?
could you not have been overestimating?
could they not have been overestimating?