避免在辦公室說這種看不懂的句子

1. Never trouble trouble till trouble troubles you. 麻煩沒來找你，就別去自找麻煩。

第一、四個trouble是動詞，第二、三個trouble是名詞。

2. I think that that that that that student wrote on the blackboard was wrong. 我認爲那個學生寫在黑板上的'那個“that”是錯誤的。

第一個that是連詞，引起賓語從句；第二、五個that是指示代詞“那個”；第三個that在這兒相當於名詞；第四個that是關係代詞，引起定語從句。

3. I know. You know. I know that you know. I know that you know that I know. 我知道。你知道。我知道你知道。我知道你知道我知道。