---------about my mother's health ,I went to my hometown last Sunday.为什么填Concerned而不填Concerning,To be concerned,Being concerned

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---------aboutmymother''shealth,IwenttomyhometownlastSunday.为什么填Concerned而不填Concerning,Tobeconcerned,

---------about my mother's health ,I went to my hometown last Sunday.为什么填Concerned而不填Concerning,To be concerned,Being concerned
---------about my mother's health ,I went to my hometown last Sunday.
为什么填Concerned而不填Concerning,To be concerned,Being concerned

---------about my mother's health ,I went to my hometown last Sunday.为什么填Concerned而不填Concerning,To be concerned,Being concerned
这是原因状语从句As I was concerned about my mother's health的省略形式.concerning本身就是介词,意思是“关于”.