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连接词
宾语从句
宾语从句过三关
连词关
语序关
时态关
I know
that Yao Ming is very
tall.
连词关、语序关
A：Yao Ming is very tall .
B: I know……
I don’t know
if ﹨ whether he is living on Mars.
A: Is he living on Mars ?
B: I don’t know……
He never tells us
why he plays basketball so well.
A: Why does he play
basketball so well ?
B: He never tells us……
第二关：语序关
I know … + “Yao Ming is very tall.”
= I know that Yao Ming is very tall.
主句+ that +陈述句
that没有词义，不充当句子成分，
在口语或非正式语中常被省略。
that- 陈述句
if ﹨ whether – 一般疑问句
特殊疑问词……