??非謂語動詞一直是CET-4的一個重點考查項目，其中分詞表原因（特別是現(xiàn)在分詞表原因）出現(xiàn)頻率較高。下面我們便結(jié)合歷年的CET-4真題對分詞表示原因進行講解。
??一、分詞邏輯主語與句子的主語一致
??分詞作狀語表示原因，相當于as， since，because等引導的原因狀語從句。
??1．______the earth to be flat，many feared that?Columbus would fall?off?the edge of the earth．
??A．Having believed ?B．BelievingC．Believed? D．Being believed
??（96．6－22答案B）
??（＝Since many people believed that．．．）
??分詞作原因狀語表示的動作是主語動作的一部分，與謂語表示的動作（或狀態(tài)）是同時或幾乎同時發(fā)生的。現(xiàn)在分詞表主動，過去分詞表被動。現(xiàn)在分詞的否定形式為not doing。
??2．Having no money but________to know，he simply said he would go without dinner．
??A．no to want anyone???B．not wanting anyone
??C．wanted no one??? ? D．to want no one（93．6－47答案B）
??3．Realizing that?he hadn'tenough money and_______to borrow from his father，he decided to sell his watch．
??A．not wanted ?B．no to want??C．not wanting ?D．wanting not
??（95．1－67答案C）
??4．The speaker，for her splendid speeches，was warmly received by the audience．
??A．having known?? B．being known
??C．knowing???? D．known
??（91．6答案D）
??如果分詞表示的動作是在謂語所表示的動作之前發(fā)生，就需要用分詞的完成形式?，F(xiàn)在分詞完成式的否定形式為not having done。
??5．______in a seemingly endless war，the general was forced to evaluate the situationagain．
??A．Since the loss of 50，000?soldiers
??B．Because of 50，000?soldiers having lost
??C．Having lost over 50，000?soldiers
??D．50，000?soldiers were?lost（93．1－59答案C）
??二、分詞邏輯主語與句子的主語不一致
??分詞作狀語時，在少數(shù)情況下，其邏輯主語與句子的主語不一致，分詞用來修飾全句。這種結(jié)構(gòu)只限于少數(shù)幾個動詞，如considering，generally speaking，judging from，talking of（談到），putting it mildly（說得客氣一點）等。其中considering可以表示原因。
??有時，分詞帶有自己的邏輯主語，構(gòu)成獨立結(jié)構(gòu)，也可以表示原因。
??6．All flights_______because of the snowstorm，any passengers could do nothing but take the train．
??A．had been canceled???B．have been canceled
??C．were canceled?????D．having been canceled
??（99．1－51答案D）
??鞏固練習：
??1．_______an answer from the committee，he?was worried and decided to fly to Paris?himself．
??A．Having not got??? B．Getting not
??C．Not having got???D．Having no been got
??2．_______，all the quarrels came to an end．
??A．The lost money was found??B．Was the lost money found
??C．Because the lost money found?D．With the lost money found
??3．______a raining day，he did not?go out?for?a walk as usual．
??A．It was ?B．What??C．It being D．Having been
??4．The decision_______，what is to be done?now is how to carry it out．
??A．been made ?????B．has been made
??C．having been made??D．having been making
??5．Deeply_______，I thanked her again and?again．
??A．being moved ?B．moved?C．moving ?D．to be moved
??（答案：1．C??2．D??3．C??4．C??5．B）
??一、分詞邏輯主語與句子的主語一致
??分詞作狀語表示原因，相當于as， since，because等引導的原因狀語從句。
??1．______the earth to be flat，many feared that?Columbus would fall?off?the edge of the earth．
??A．Having believed ?B．BelievingC．Believed? D．Being believed
??（96．6－22答案B）
??（＝Since many people believed that．．．）
??分詞作原因狀語表示的動作是主語動作的一部分，與謂語表示的動作（或狀態(tài)）是同時或幾乎同時發(fā)生的。現(xiàn)在分詞表主動，過去分詞表被動。現(xiàn)在分詞的否定形式為not doing。
??2．Having no money but________to know，he simply said he would go without dinner．
??A．no to want anyone???B．not wanting anyone
??C．wanted no one??? ? D．to want no one（93．6－47答案B）
??3．Realizing that?he hadn'tenough money and_______to borrow from his father，he decided to sell his watch．
??A．not wanted ?B．no to want??C．not wanting ?D．wanting not
??（95．1－67答案C）
??4．The speaker，for her splendid speeches，was warmly received by the audience．
??A．having known?? B．being known
??C．knowing???? D．known
??（91．6答案D）
??如果分詞表示的動作是在謂語所表示的動作之前發(fā)生，就需要用分詞的完成形式?，F(xiàn)在分詞完成式的否定形式為not having done。
??5．______in a seemingly endless war，the general was forced to evaluate the situationagain．
??A．Since the loss of 50，000?soldiers
??B．Because of 50，000?soldiers having lost
??C．Having lost over 50，000?soldiers
??D．50，000?soldiers were?lost（93．1－59答案C）
??二、分詞邏輯主語與句子的主語不一致
??分詞作狀語時，在少數(shù)情況下，其邏輯主語與句子的主語不一致，分詞用來修飾全句。這種結(jié)構(gòu)只限于少數(shù)幾個動詞，如considering，generally speaking，judging from，talking of（談到），putting it mildly（說得客氣一點）等。其中considering可以表示原因。
??有時，分詞帶有自己的邏輯主語，構(gòu)成獨立結(jié)構(gòu)，也可以表示原因。
??6．All flights_______because of the snowstorm，any passengers could do nothing but take the train．
??A．had been canceled???B．have been canceled
??C．were canceled?????D．having been canceled
??（99．1－51答案D）
??鞏固練習：
??1．_______an answer from the committee，he?was worried and decided to fly to Paris?himself．
??A．Having not got??? B．Getting not
??C．Not having got???D．Having no been got
??2．_______，all the quarrels came to an end．
??A．The lost money was found??B．Was the lost money found
??C．Because the lost money found?D．With the lost money found
??3．______a raining day，he did not?go out?for?a walk as usual．
??A．It was ?B．What??C．It being D．Having been
??4．The decision_______，what is to be done?now is how to carry it out．
??A．been made ?????B．has been made
??C．having been made??D．having been making
??5．Deeply_______，I thanked her again and?again．
??A．being moved ?B．moved?C．moving ?D．to be moved
??（答案：1．C??2．D??3．C??4．C??5．B）