为什么要加did?Only when he got into trouble____not having taken M

what did he see when he went into the office?这里为什么用when而不用别的 when he got back he d----- that someone had taken his suitca when did your uncle arrive___china?he got to Guangzhou__the only when he got ill ( )the value of health when he was only three ,he started having ___ lessons .He co Not having got any answer,he was rather worried.这句为什么用having When he heard the bad news,he got (m ) He often got into trouble with the police.和She did not give I got home ____they were having dinner.为什么填while而不是when 在倒装句中,比如Only when he reached the tea-house (did he realize)i Only when he told me did I realize what trouble he was in．(翻 Only when he reached the tea-house did he realize it was the