1.  由并列词或逗号、分号把两个或两个以上、具有逻辑关系的简单句连接为一体，就构成了并列句。    
      2. 常用的并列连词有：
      and   “和”
      or     “否则”
      but   “可是；但是”
      for     “因为”  
      so    “因此”
      either… or…   “不是…就是…”
      neither … nor …“ 既不…也不…”
      not only… but also… “不但…而且…”
      3.常用的副词有：
      yet         “但是” 
      however     “然而”    
      therefore    “所以”
      Note: 此类词 前常有逗号或分号与前句分开。
      e.g.
      1) Hurry up! It’s going to rain.
      2) He had to come back home; he wanted some money.
      3) Tears appeared in her eyes, but he didn’t  notice it.
      4) Spring came and the trees turned green.
      5) She mus t be ill, for she didn’t come to school thi s morning.
      6) He found nobo dy in the room, so he went away.
      7) He is old, yet he is still active in his work.[来源:Z&xx&k.Com][来源:学*科*网]
      8) The composition is all  right; however there is room for improvement.
      9) He was very tired, and therefore h e fell  sound asleep.
      10) We must hurry, o r we’ll be late.
      11) Either he is wrong or you are wrong.
      12) He doesn’t  know her, nor do I.
      13 ) Not only was my mother angry, but my father also.
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