当sb是不定代词的时候,只能是callsb up, 例如,call her up,call him up...
当sb是人名或指定的某人时候,比如 call Tom up, call up Tom, call mom up, call up mom...两种表达都是对的,只有sb是不定代词时候,只能为call sb up.call up sb是召集人，call sb up是打电话给某人。这说法对吗？ 都是一个意思？call up 有“打电话给” 和“征召⋯⋯入伍” 的两种意思。但是用法遵循语法中对不定代词的限制。when I'm in Berlin, I willcall him up/ I will call Hans up/ I will call up Hans. He called up the museum. 他给博物馆打了电话。TheUnited States has called up some 100,000 military reservists. 此举中call up 为招募。：）