不是,outside在本句为副词性质,作地点状语;outside具有双重属性:副词和介词,区别是作介词后面必须接帆颂亏名词态神。樱备eg. he is playing with neighbours outside. 副词性质 he is playing with neighbors outside the yard. 介词性质
It's too cold outside today. 意思是核蚂大运: 今天外面很冷。 outside 是副词,例如: I stepped outside and pulled up my collar against the cold mist. 我走到外面,拉起衣领以抵改仿埋御寒雾。 Outside, the light was fading rapidly. 在外面,光在快速消失。