1、wh-从句中的省略，例如he came to see me once,but I don't rem髫潋啜缅ember when( he came to see me)他曾经来看过我，但我忘了是什么时候
3、例如She hoped 猾诮沓靥(that) he would arrive on time 她希望他按时到达，I have the belief that I will succeed. 我怀有必胜的信念（同位语从句）
5、that在定语从句中作表语时可以省略，例如He is no longer the man(that) he used to be他不再是过去的那个人了
