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used for 。 custom said they weren’t salty 。 (1)said 后是賓語從句 ,省略了 , 從句也要用過去的某種時態(tài) 。 如 : He asked me whom I was waiting for. 他問我在等誰 . (2)enough修飾形容詞或副詞時應(yīng)后置 . 如 : The little child was not old enough to go to ,不能去上學(xué) . 但 enough 修飾名詞時 ,可以放在名詞之前 ,也可以放在名詞之后 。 如 : I have enough money to buy it.( I have money enough to buy it.) potato chips were invented by ,薯片被發(fā)明了 。 Mistake 做名詞 ,意為 “弄錯 ,誤解 ”如 : You have made a foolish mistake. 你犯了一個愚蠢的錯誤 。 Mistake 作動詞 ,意為 “弄錯 ,誤解 ”如 : She didn’t speak very clearly so I mistook what she ,所以我誤解了她的話 。 By mistake 意為 “錯誤地 ,弄錯地 ”. I took his backpack by mistake. 我錯拿了他 的書包 。 He put salt in her cup of tea by mistake. 他錯把鹽放進她的茶里 。 tea wasn’t brought to the western world until 1610, this beverage was discovered over three thousand years before ,茶直到 1610 年才傳入西方世界 ,但是這種飲料在三千多年前就被發(fā)現(xiàn)了 . (1)although 作連詞 ,意為 “雖然 ,盡管 ”,引導(dǎo)讓步狀語從句 ,我們不能根據(jù)漢語習(xí)慣 .在后面使用連詞 but,不過它可以與 yet, still 連用 。若主從句的主語相同 ,且 從句謂語含有動詞 be,可將從句主語和動詞 be 省略 .如 K] Although (it was) snowing, it was not very cold. 雖然在下雪 ,但是天氣不是很冷 . There is air around us, although we can’t see it. 盡管我們看不見 ,但是我們周圍全是空氣 . Although (he is) quite young, he knows a lot. 雖然他很年輕 ,但是他很懂事 (3) not…until 意為 “直到 …… 才