主语补语有时可以有从句来充当例如,people are just born what color they are.what color they are 是一个名词性从句,本句也是由一个从句来充当的.你的那句话,从句型角度来看是定语从句,但充当的是主语补语.但这是按照你答案来说.单个人认为这确实是个定语从句
这是一个由关系代词 that 引导的定语从句,that代the honest boy 在定语从句中作used to be的表语。 主语补语是下面这种情况:They made the boy wash the car. wash the car为宾补。 The boy was made to wash the car. to wash the car为主语补语。