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