五、连词连词是虚词,不能在句中单独担任成分,只起连接作用
按其用法,连词可分为两大类:并列连词和从属连词
1并列连词连接具有并列关系的词、短语或句子
⒈并列关系:and,notonly…butalso…,both…and…,neither…nor…如:IusedtoliveinParisandLondon
BothJaneandJimareinterestedinfishing
Theweatherhereisneithertoocoldnortoohot
Sheisnotonlykindbutalsohonest
⒉转折关系:but,yet,while(然而),when(然而,偏偏)如:Thecarisveryoldbutitrunsveryfast
Theproblemwasalittlehard,yetIwasabletoworkitout
ThewinterinBeijingisverycoldwhilethatofKunmingiswarm
Whydidyouborrowthebookwhenyouhadone
⒊选择关系:or,not…but…,either…or…如:Wouldyouliketoliveorwouldyouliketostay
Heisnotateacherbutawriter
YoucancomeeitheronSaturdayoronSunday
⒋因果关系:for如:Itmusthaverainedlastnight,forthegroundiswetnow
Theleavesofthetreesarefalling
foralreadyautumn
区别①and和or⑴并列结构中,or通常用于否定句,and用于肯定句
⑵但有时and也可用于否定句
请注意其不同特点:如:Thereisnoairorwaterinthemoon