第九章    名詞性從句

  when引導的時間狀語從句和名詞性從句中的不同時態(tài)。
  please lt me know when you arrive. 你到的時候，請告訴我一聲。（when引導的是時間狀語從句，從句中用一般現(xiàn)在時來表示將來。）
  please let me know when you will arrive. 請告訴我你什么時候到。（when引導的是賓語從句，從句中用一般將來時。） e.whoever, whomever, whatever, whichever, whosever
   連接代詞whoever = anyone who任何人, 無論誰；whatever =anything that凡是...，無論什么；whichever = anything that無論那一個, 任何一個；whomever = anyone whom （whoever的賓格形式）。
  whoever comes to the club is welcome. 不論誰來參加這個俱樂部都歡迎。
  whatever is worth doing at all is worth doing well.凡是值得做的就值得做好。
  they ate whatever they could find o the deserted island. 他們在荒島找到什么就吃什么。
  you may do whatever you will. 你可做任何你想做的事。
  i'll take whichever book interests me.我愿買任何讓我感興趣的書。
  whosever book is overdue will be fined. 不管誰的書過期未還都要被罰款。
  比較：
  連接代詞whoever在賓語從句中作主語，whomever作賓語從句中賓語。
  you may offer he book to whoever wants it. 你可把這本書給任何想要的人。（此句中不能使用whomever，因為whoever在賓語從句中作wants it的主語）
  you may offer the book to whomever you like.你可把這本書給任何你喜歡的人。（whomever在賓語從句中作you like的賓語）
一、           表語從句   表語從句放在連系動詞之后，充當復合句中的表語。   a.可接表語從句的連系動詞
  可接表語從句的連系動詞有be, look, seem, sound, appear等。
  china is no longer what she used to be. 今日的中國不再是過去的中國了。
  the question remains whether they will be able to help us. 問題還是他們能否幫我們。
  itappears that he has a taste for music.看來他對音樂有一定的鑒賞力.
  at that time, it seemed as if i couldn'  t think of the right word anyhow. 當時，我似乎怎么也想不出一個恰當?shù)淖盅蹃怼?b.as, as ifthough引導的表語從句
  he looked just as he had looked ten years before. 他看起來還與十年前一樣。
  it sounds as ifsomeone is knocking at the door. 聽起來好像有人在敲門。   c.because, why引導的表語從句
  i think it is because you are talking too much. 我想這是因為你話說得太多。
  that's because he didn't understand me. 那是因為他沒有理解我。（that's because 三      同位語從句   同位語從句用于對前面的名詞作進一步解釋，說明名詞的具體內(nèi)容。同位語從句一般由that引導，但也可以由whether 以及連接代詞和連接副詞引導。 a.同位語從句一般跟在名詞fact, hope, idea, news, doubt, suggestion, information, opinion, decision, discovery, truth, promise, statement, problem, rule等的面。