I could silence you could silence she could silence we could silence you could silence they could silence
V-ing form
I could be silencing you could be silencing she could be silencing we could be silencing you could be silencing they could be silencing
Perfect
I could have silenced you could have silenced she could have silenced we could have silenced you could have silenced they could have silenced
V-ing perfect
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
Negation
Simple form
I couldn't silence you couldn't silence she couldn't silence we couldn't silence you couldn't silence they couldn't silence
V-ing form
I couldn't be silencing you couldn't be silencing she couldn't be silencing we couldn't be silencing you couldn't be silencing they couldn't be silencing
Perfect
I couldn't have silenced you couldn't have silenced she couldn't have silenced we couldn't have silenced you couldn't have silenced they couldn't have silenced
V-ing perfect
I couldn't have been silencing you couldn't have been silencing she 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
Simple form
could I silence? could you silence? could she silence? could we silence? could you silence? could they silence?
V-ing form
could I be silencing? could you be silencing? could she be silencing? could we be silencing? could you be silencing? could they be silencing?
Perfect
could I have silenced? could you have silenced? could she have silenced? could we have silenced? could you have silenced? could they have silenced?
V-ing perfect
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?
Interro-negative form
Simple form
couldn't I silence? couldn't you silence? couldn't she silence? couldn't we silence? couldn't you silence? couldn't they silence?
V-ing form
couldn't I be silencing? couldn't you be silencing? couldn't she be silencing? couldn't we be silencing? couldn't you be silencing? couldn't they be silencing?
Perfect
couldn't I have silenced? couldn't you have silenced? couldn't she have silenced? couldn't we have silenced? couldn't you have silenced? couldn't they have silenced?
V-ing perfect
couldn't I have been silencing? couldn't you have been silencing? couldn't she have been silencing? couldn't we have been silencing? couldn't you have been silencing? couldn't they have been silencing?