could jitter
Verbo regular: jitter - jittered- jittered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could jitter
you could jitter
she could jitter
we could jitter
you could jitter
they could jitter 	I could be jittering
you could be jittering
she could be jittering
we could be jittering
you could be jittering
they could be jittering	I could have jittered
you could have jittered
she could have jittered
we could have jittered
you could have jittered
they could have jittered	I could have been jittering
you could have been jittering
she could have been jittering
we could have been jittering
you could have been jittering
they could have been jittering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not jitter
you could not jitter
she could not jitter
we could not jitter
you could not jitter
they could not jitter 	I could not be jittering
you could not be jittering
she could not be jittering
we could not be jittering
you could not be jittering
they could not be jittering	I could not have jittered
you could not have jittered
she could not have jittered
we could not have jittered
you could not have jittered
they could not have jittered	I could not have been jittering
you could not have been jittering
she could not have been jittering
we could not have been jittering
you could not have been jittering
they could not have been jittering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I jitter?
could you jitter?
could she jitter?
could we jitter?
could you jitter?
could they jitter? 	could I be jittering?
could you be jittering?
could she be jittering?
could we be jittering?
could you be jittering?
could they be jittering? 	could I have jittered?
could you have jittered?
could she have jittered?
could we have jittered?
could you have jittered?
could they have jittered? 	could I have been jittering?
could you have been jittering?
could she have been jittering?
could we have been jittering?
could you have been jittering?
could they have been jittering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not jitter?
could you not jitter?
could she not jitter?
could we not jitter?
could you not jitter?
could they not jitter? 	could I not be jittering?
could you not be jittering?
could she not be jittering?
could we not be jittering?
could you not be jittering?
could they not be jittering? 	could I not have jittered?
could you not have jittered?
could she not have jittered?
could we not have jittered?
could you not have jittered?
could they not have jittered? 	could I not have been jittering?
could you not have been jittering?
could she not have been jittering?
could we not have been jittering?
could you not have been jittering?
could they not have been jittering?