Past tense of undo
The past simple of undo is undid and the past participle is undone: undo – undid – undone.
- Base form V1
- undo
- Past simple V2
- undid
- Past participle V3
- undone
Start irregular verbs training
undo, undid, undone and 316 more, in Retite Pro. New accounts try it free.
Meaning of undo
To open something that is tied or fastened
- ExampleHe undid the top button of his shirt.
Undo, undid, undone in sentences
- Past simpleHe undid his shoelaces.
- Past participleThe damage cannot be undone.
Common mistakes
undoedundid. Undo is irregular, so it does not take -ed.The damage cannot be undid.The damage cannot be undone. After be in the passive, use the past participle, undone.
Similar verbs
Undo is built on do and changes the same way.
All three forms different, like undo: be, do, go, know, see, take, give, write.
Common questions
What is the past tense of undo?
Undid. For example: He undid his shoelaces.
What is the past participle of undo?
Undone. It follows be in the passive, as in The damage cannot be undone.
Is undo a regular verb?
No. Undo is irregular: its past forms do not end in -ed.
