happened is happen's Past Tense

happen

US [ˈhæpən]
UK ['hæpən]
  • v.发生;〈口〉出现;偶然…
  • Web碰巧;发生了;发生过
Simple Present:happens  Present Participle:happening  Past Tense:happened  
v.
1.
发生;〈口〉出现
2.
偶然...,碰巧... (to do)

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard