could silence
Verbo regular: silence - silenced- silenced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could silence
you could silence
she could silence
we could silence
you could silence
they could silence 	I could be silencing
you could be silencing
she could be silencing
we could be silencing
you could be silencing
they could be silencing	I could have silenced
you could have silenced
she could have silenced
we could have silenced
you could have silenced
they could have silenced	I could have been silencing
you could have been silencing
she could have been silencing
we could have been silencing
you could have been silencing
they could have been silencing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not silence
you could not silence
she could not silence
we could not silence
you could not silence
they could not silence 	I could not be silencing
you could not be silencing
she could not be silencing
we could not be silencing
you could not be silencing
they could not be silencing	I could not have silenced
you could not have silenced
she could not have silenced
we could not have silenced
you could not have silenced
they could not have silenced	I could not have been silencing
you could not have been silencing
she could not have been silencing
we could not have been silencing
you could not have been silencing
they could not have been silencing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I silence?
could you silence?
could she silence?
could we silence?
could you silence?
could they silence? 	could I be silencing?
could you be silencing?
could she be silencing?
could we be silencing?
could you be silencing?
could they be silencing? 	could I have silenced?
could you have silenced?
could she have silenced?
could we have silenced?
could you have silenced?
could they have silenced? 	could I have been silencing?
could you have been silencing?
could she have been silencing?
could we have been silencing?
could you have been silencing?
could they have been silencing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not silence?
could you not silence?
could she not silence?
could we not silence?
could you not silence?
could they not silence? 	could I not be silencing?
could you not be silencing?
could she not be silencing?
could we not be silencing?
could you not be silencing?
could they not be silencing? 	could I not have silenced?
could you not have silenced?
could she not have silenced?
could we not have silenced?
could you not have silenced?
could they not have silenced? 	could I not have been silencing?
could you not have been silencing?
could she not have been silencing?
could we not have been silencing?
could you not have been silencing?
could they not have been silencing?