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