介词加名词相当于一个副词?

（1）是的.
（2）介词加名词一般作状语,如伴随状语,时间状语,地点状语等.
（3）试举几例：I usually go to school at 8 in the morning时间状语.I stayed in my room地点状语 last Sunday.He passed by without a word伴随状语.
但愿能帮到您.