Regular verb: unbutton - unbuttoned - unbuttoned
Simple form | V-ing form |
I could unbutton you could unbutton she could unbutton we could unbutton you could unbutton they could unbutton | I could be unbuttoning you could be unbuttoning she could be unbuttoning we could be unbuttoning you could be unbuttoning they could be unbuttoning |
Perfect | V-ing perfect |
I could have unbuttoned you could have unbuttoned she could have unbuttoned we could have unbuttoned you could have unbuttoned they could have unbuttoned | I could have been unbuttoning you could have been unbuttoning she could have been unbuttoning we could have been unbuttoning you could have been unbuttoning they could have been unbuttoning |
Simple form | V-ing form |
I couldn't unbutton you couldn't unbutton she couldn't unbutton we couldn't unbutton you couldn't unbutton they couldn't unbutton | I couldn't be unbuttoning you couldn't be unbuttoning she couldn't be unbuttoning we couldn't be unbuttoning you couldn't be unbuttoning they couldn't be unbuttoning |
Perfect | V-ing perfect |
I couldn't have unbuttoned you couldn't have unbuttoned she couldn't have unbuttoned we couldn't have unbuttoned you couldn't have unbuttoned they couldn't have unbuttoned | I couldn't have been unbuttoning you couldn't have been unbuttoning she couldn't have been unbuttoning we couldn't have been unbuttoning you couldn't have been unbuttoning they couldn't have been unbuttoning |
Simple form | V-ing form |
could I unbutton? could you unbutton? could she unbutton? could we unbutton? could you unbutton? could they unbutton? | could I be unbuttoning? could you be unbuttoning? could she be unbuttoning? could we be unbuttoning? could you be unbuttoning? could they be unbuttoning? |
Perfect | V-ing perfect |
could I have unbuttoned? could you have unbuttoned? could she have unbuttoned? could we have unbuttoned? could you have unbuttoned? could they have unbuttoned? | could I have been unbuttoning? could you have been unbuttoning? could she have been unbuttoning? could we have been unbuttoning? could you have been unbuttoning? could they have been unbuttoning? |
Simple form | V-ing form |
couldn't I unbutton? couldn't you unbutton? couldn't she unbutton? couldn't we unbutton? couldn't you unbutton? couldn't they unbutton? | couldn't I be unbuttoning? couldn't you be unbuttoning? couldn't she be unbuttoning? couldn't we be unbuttoning? couldn't you be unbuttoning? couldn't they be unbuttoning? |
Perfect | V-ing perfect |
couldn't I have unbuttoned? couldn't you have unbuttoned? couldn't she have unbuttoned? couldn't we have unbuttoned? couldn't you have unbuttoned? couldn't they have unbuttoned? | couldn't I have been unbuttoning? couldn't you have been unbuttoning? couldn't she have been unbuttoning? couldn't we have been unbuttoning? couldn't you have been unbuttoning? couldn't they have been unbuttoning? |