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