I could beckon you could beckon he could beckon we could beckon you could beckon they could beckon
V-ing form
I could be beckoning you could be beckoning he could be beckoning we could be beckoning you could be beckoning they could be beckoning
Perfect
I could have beckoned you could have beckoned he could have beckoned we could have beckoned you could have beckoned they could have beckoned
V-ing perfect
I could have been beckoning you could have been beckoning he could have been beckoning we could have been beckoning you could have been beckoning they could have been beckoning
Negation
Simple form
I couldn't beckon you couldn't beckon he couldn't beckon we couldn't beckon you couldn't beckon they couldn't beckon
V-ing form
I couldn't be beckoning you couldn't be beckoning he couldn't be beckoning we couldn't be beckoning you couldn't be beckoning they couldn't be beckoning
Perfect
I couldn't have beckoned you couldn't have beckoned he couldn't have beckoned we couldn't have beckoned you couldn't have beckoned they couldn't have beckoned
V-ing perfect
I couldn't have been beckoning you couldn't have been beckoning he couldn't have been beckoning we couldn't have been beckoning you couldn't have been beckoning they couldn't have been beckoning
Interrogative form
Simple form
could I beckon? could you beckon? could he beckon? could we beckon? could you beckon? could they beckon?
V-ing form
could I be beckoning? could you be beckoning? could he be beckoning? could we be beckoning? could you be beckoning? could they be beckoning?
Perfect
could I have beckoned? could you have beckoned? could he have beckoned? could we have beckoned? could you have beckoned? could they have beckoned?
V-ing perfect
could I have been beckoning? could you have been beckoning? could he have been beckoning? could we have been beckoning? could you have been beckoning? could they have been beckoning?
Interro-negative form
Simple form
couldn't I beckon? couldn't you beckon? couldn't he beckon? couldn't we beckon? couldn't you beckon? couldn't they beckon?
V-ing form
couldn't I be beckoning? couldn't you be beckoning? couldn't he be beckoning? couldn't we be beckoning? couldn't you be beckoning? couldn't they be beckoning?
Perfect
couldn't I have beckoned? couldn't you have beckoned? couldn't he have beckoned? couldn't we have beckoned? couldn't you have beckoned? couldn't they have beckoned?
V-ing perfect
couldn't I have been beckoning? couldn't you have been beckoning? couldn't he have been beckoning? couldn't we have been beckoning? couldn't you have been beckoning? couldn't they have been beckoning?