could silence
Regular verb: silence - silenced- silenced

Affirmation 	
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I could silence
you could silence
he could silence
we could silence
you could silence
they could silence 	I could be silencing
you could be silencing
he could be silencing
we could be silencing
you could be silencing
they could be silencing	I could have silenced
you could have silenced
he 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
he could have been silencing
we could have been silencing
you could have been silencing
they could have been silencing	

Negation 	
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I couldn't silence
you couldn't silence
he couldn't silence
we couldn't silence
you couldn't silence
they couldn't silence 	I couldn't be silencing
you couldn't be silencing
he couldn't be silencing
we couldn't be silencing
you couldn't be silencing
they couldn't be silencing	I couldn't have silenced
you couldn't have silenced
he couldn't have silenced
we couldn't have silenced
you couldn't have silenced
they couldn't have silenced	I couldn't have been silencing
you couldn't have been silencing
he couldn't have been silencing
we couldn't have been silencing
you couldn't have been silencing
they couldn't have been silencing	

Interrogative form 	
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could I silence?
could you silence?
could he silence?
could we silence?
could you silence?
could they silence? 	could I be silencing?
could you be silencing?
could he be silencing?
could we be silencing?
could you be silencing?
could they be silencing? 	could I have silenced?
could you have silenced?
could he 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 he have been silencing?
could we have been silencing?
could you have been silencing?
could they have been silencing? 	

Interro-negative form 	
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couldn't I silence?
couldn't you silence?
couldn't he silence?
couldn't we silence?
couldn't you silence?
couldn't they silence? 	couldn't I be silencing?
couldn't you be silencing?
couldn't he be silencing?
couldn't we be silencing?
couldn't you be silencing?
couldn't they be silencing? 	couldn't I have silenced?
couldn't you have silenced?
couldn't he have silenced?
couldn't we have silenced?
couldn't you have silenced?
couldn't they have silenced? 	couldn't I have been silencing?
couldn't you have been silencing?
couldn't he have been silencing?
couldn't we have been silencing?
couldn't you have been silencing?
couldn't they have been silencing?