??分詞結(jié)構(gòu)可以代替從句，起連接作用。用分詞結(jié)構(gòu)代替從句時(shí)，如果主從句的主語一致，從句是主動(dòng)語態(tài)，一般用現(xiàn)在分詞，從句是被動(dòng)語態(tài)，用過去分詞；如果主從句的主語不一致，則用分詞獨(dú)立結(jié)構(gòu)（名詞／代詞＋分詞結(jié)構(gòu)）代替從句。如：
??1．分詞結(jié)構(gòu)代替時(shí)間狀語從句，此時(shí)現(xiàn)在分詞可與和原來連詞同形的介詞，如since，before，after等或與連詞while，when，whenever等連用。例如：
??Since I phoned you this morning，I have changed my plans．→Since phoning you this morning，I have changed my plans．
??When it is seen from the hill，the city looks magnificent．→Seen from the hill，the city looks magnificent．
??如果兩個(gè)動(dòng)作同時(shí)發(fā)生，多用 when或while ＋分詞。例如：
??I got to know him while I was attending a conference．→I got to know him while attending a conference．
??2．分詞結(jié)構(gòu)代替原因從句。例如：
??As I was anxious to please him，I bought him a nice present．→Being anxious to please him，I bought him a nice present．
Because so many people were absent，we decided to put the meeting off．→So many people being absent，we decided to put the meeting off．
??3．分詞結(jié)構(gòu)代替條件從句，有時(shí)可與if，once， even if，unless等連用。例如：
??Unless it is changed，this law will make life difficult for farmers．→Unless changed，this law will make life difficult for farmers．
??I fall things are considered，his article is of greater value than yours．→All things considered，his article is of greater value than yours．
??4．分詞結(jié)構(gòu)代替讓步從句，可與連詞though， although，whether．．．or等連用。例如：
While he admitted that he had received the stolen jewelery，he denied having taken part in the robbery．→（While）Admitting that he received the stolen jewelery，he denied having taken part in the robbery．
??1．分詞結(jié)構(gòu)代替時(shí)間狀語從句，此時(shí)現(xiàn)在分詞可與和原來連詞同形的介詞，如since，before，after等或與連詞while，when，whenever等連用。例如：
??Since I phoned you this morning，I have changed my plans．→Since phoning you this morning，I have changed my plans．
??When it is seen from the hill，the city looks magnificent．→Seen from the hill，the city looks magnificent．
??如果兩個(gè)動(dòng)作同時(shí)發(fā)生，多用 when或while ＋分詞。例如：
??I got to know him while I was attending a conference．→I got to know him while attending a conference．
??2．分詞結(jié)構(gòu)代替原因從句。例如：
??As I was anxious to please him，I bought him a nice present．→Being anxious to please him，I bought him a nice present．
Because so many people were absent，we decided to put the meeting off．→So many people being absent，we decided to put the meeting off．
??3．分詞結(jié)構(gòu)代替條件從句，有時(shí)可與if，once， even if，unless等連用。例如：
??Unless it is changed，this law will make life difficult for farmers．→Unless changed，this law will make life difficult for farmers．
??I fall things are considered，his article is of greater value than yours．→All things considered，his article is of greater value than yours．
??4．分詞結(jié)構(gòu)代替讓步從句，可與連詞though， although，whether．．．or等連用。例如：
While he admitted that he had received the stolen jewelery，he denied having taken part in the robbery．→（While）Admitting that he received the stolen jewelery，he denied having taken part in the robbery．