Regular verb: sign - signed - signed
Simple form | V-ing form |
I could sign you could sign he could sign we could sign you could sign they could sign | I could be signing you could be signing he could be signing we could be signing you could be signing they could be signing |
Perfect | V-ing perfect |
I could have signed you could have signed he could have signed we could have signed you could have signed they could have signed | I could have been signing you could have been signing he could have been signing we could have been signing you could have been signing they could have been signing |
Simple form | V-ing form |
I couldn't sign you couldn't sign he couldn't sign we couldn't sign you couldn't sign they couldn't sign | I couldn't be signing you couldn't be signing he couldn't be signing we couldn't be signing you couldn't be signing they couldn't be signing |
Perfect | V-ing perfect |
I couldn't have signed you couldn't have signed he couldn't have signed we couldn't have signed you couldn't have signed they couldn't have signed | I couldn't have been signing you couldn't have been signing he couldn't have been signing we couldn't have been signing you couldn't have been signing they couldn't have been signing |
Simple form | V-ing form |
could I sign? could you sign? could he sign? could we sign? could you sign? could they sign? | could I be signing? could you be signing? could he be signing? could we be signing? could you be signing? could they be signing? |
Perfect | V-ing perfect |
could I have signed? could you have signed? could he have signed? could we have signed? could you have signed? could they have signed? | could I have been signing? could you have been signing? could he have been signing? could we have been signing? could you have been signing? could they have been signing? |
Simple form | V-ing form |
couldn't I sign? couldn't you sign? couldn't he sign? couldn't we sign? couldn't you sign? couldn't they sign? | couldn't I be signing? couldn't you be signing? couldn't he be signing? couldn't we be signing? couldn't you be signing? couldn't they be signing? |
Perfect | V-ing perfect |
couldn't I have signed? couldn't you have signed? couldn't he have signed? couldn't we have signed? couldn't you have signed? couldn't they have signed? | couldn't I have been signing? couldn't you have been signing? couldn't he have been signing? couldn't we have been signing? couldn't you have been signing? couldn't they have been signing? |