tracking down is track down's Present Participle

track down

US 
UK 
  • v.追赶
Simple Present:tracks down  Present Participle:tracking down  Past Tense:tracked down  

Sample Sentence

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