tumbling down is tumble down's Present Participle

tumble down

US 
UK 
  • na.同“tumble”
  • Web向下跌落;落下来;倒塌
Simple Present:tumbles down  Present Participle:tumbling down  Past Tense:tumbled down  
na.
1.
同“tumble”
2.
同“tumble”

Sample Sentence

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