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