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