Unit 3 I'm more outgoing than my sister.知识点笔记 - 百度文库
I don’t really care if my friends are the same as me or different. (1) [连词]是否,引导宾语从句。 Can you tell me if he can play the piano (陈述语序) (2) [连词]如果,引导条件状语从句。遵循“主将从现”原则。 If it rains tomorrow, I will not climb the mountain. (主将从现) ...