Irregular verb: undo - undid - undone
Simple form | V-ing form |
I must undo you must undo she must undo we must undo you must undo they must undo | I must be undoing you must be undoing she must be undoing we must be undoing you must be undoing they must be undoing |
Perfect | V-ing perfect |
I must have undone you must have undone she must have undone we must have undone you must have undone they must have undone | I must have been undoing you must have been undoing she must have been undoing we must have been undoing you must have been undoing they must have been undoing |
Simple form | V-ing form |
I mustn't undo you mustn't undo she mustn't undo we mustn't undo you mustn't undo they mustn't undo | I mustn't be undoing you mustn't be undoing she mustn't be undoing we mustn't be undoing you mustn't be undoing they mustn't be undoing |
Perfect | V-ing perfect |
I mustn't have undone you mustn't have undone she mustn't have undone we mustn't have undone you mustn't have undone they mustn't have undone | I mustn't have been undoing you mustn't have been undoing she mustn't have been undoing we mustn't have been undoing you mustn't have been undoing they mustn't have been undoing |
Simple form | V-ing form |
must I undo? must you undo? must she undo? must we undo? must you undo? must they undo? | must I be undoing? must you be undoing? must she be undoing? must we be undoing? must you be undoing? must they be undoing? |
Perfect | V-ing perfect |
must I have undone? must you have undone? must she have undone? must we have undone? must you have undone? must they have undone? | must I have been undoing? must you have been undoing? must she have been undoing? must we have been undoing? must you have been undoing? must they have been undoing? |
Simple form | V-ing form |
mustn't I undo? mustn't you undo? mustn't she undo? mustn't we undo? mustn't you undo? mustn't they undo? | mustn't I be undoing? mustn't you be undoing? mustn't she be undoing? mustn't we be undoing? mustn't you be undoing? mustn't they be undoing? |
Perfect | V-ing perfect |
mustn't I have undone? mustn't you have undone? mustn't she have undone? mustn't we have undone? mustn't you have undone? mustn't they have undone? | mustn't I have been undoing? mustn't you have been undoing? mustn't she have been undoing? mustn't we have been undoing? mustn't you have been undoing? mustn't they have been undoing? |