Irregular verb · Special

undo — undid — undone

The three forms of the verb undo. Meaning: to open something that was tied or closed; to cancel an action.

Base formundo

Past Simpleundid

Past Participleundone

Which form where

Past tense — the second form: I undid
Past negatives and questions — did and the first form: didn't undo · Did you undo?
Present Perfect — have / has and the third form: have undone · has undone

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do
go
come
run
become
lie
overcome
undergo
overdo
outdo
outrun

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Which form where

Same group: Special

Learn the verbs, don't just read the list

Reps: English Drills

Which form where

Same group: Special

Learn the verbs, don't just read the list

Reps: English Drills