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