不规则动词使用频率第 158 位A — B — C

undo

原形

undo

/ʌnˈduː/

过去式

undid

/ʌnˈdɪd/

过去分词

undone

/ʌnˈdʌn/

中文意思B2

解开，撤销

what’s done cannot be undone

英文释义

to open something tied or fastened; to cancel the effect of something

疑问句 · 第 1 种形式Can you undo this knot for me?
祈使句 · 第 1 种形式Undo your seat belt only when the plane stops.
一般过去时 · 第 2 种形式Yesterday Ben undid all my hard work in five minutes.
一般过去时 · 第 2 种形式Last night I undid the top button of my shirt because it was so hot.
现在完成时 · 第 3 种形式I’ve undone the last change, so the file is back to normal.
被动语态 · 第 3 种形式The damage to the old building can’t be undone.