分析句子成分（定状补同位）： 1. We often study Chinese history on Friday afternoon. 2. The boy who offered me his seat is called Tom. 3 I shall go there if it doesn’t rain 4 Once you begin, you must continue 5 We found everything in good order. 6 His favorite sport, playing volleyball, takes most of his spare time.

定语

时间状语

定语从句

条件状语从句

条件状语从句

宾语补足语

定语

同位语