II. up·end [ʌpˈend] 动词 不及物动词
1. upend (rise on end):
- upend
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2. upend (submerge head):
- upend duck
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| you | upend |
| he/she/it | upends |
| we | upend |
| you | upend |
| they | upend |
| I | upended |
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| you | upended |
| he/she/it | upended |
| we | upended |
| you | upended |
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| I | have | upended |
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| you | have | upended |
| he/she/it | has | upended |
| we | have | upended |
| you | have | upended |
| they | have | upended |
| I | had | upended |
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| you | had | upended |
| he/she/it | had | upended |
| we | had | upended |
| you | had | upended |
| they | had | upended |
无例句可用
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单语范例（未经PONS编辑处理）
Mastery learning upends this approach, by requiring each student to master the topic before moving to the next one.
en.wikipedia.org The genre has been credited with upending the stereotype of gaming as a sedentary activity, and promoting an active lifestyle.
en.wikipedia.org It walks well, without waddling, and although it normally feeds by upending, it can dive if necessary.
en.wikipedia.org A place where social norms were upended was inherently suspect.
en.wikipedia.org Indirectly, it is upending the international monetary system.
en.wikipedia.org