1．主语 + 系动词 + 表语：
  A foreign language is a weapon in the struggle of life.
  The plan sounds perfect.
  This material feels soft.
  This is where I work.
2．主语 + 谓语：
  The telephone rang.
  His father might have died.
  We all breathe, drink and eat.
注：这种结构中的谓语动词是不及物动词，状语并非结构上不可缺少的成分。但在某种情况下，不加状语便不能表达完整的意思，这就引出了下列句型：
△    主语 + 谓语 + 状语：
  The meeting lasted for two hours.
  We walked for five miles.
  This box weighs five kilos.
  He lives in Guangzhou.
  They will be flying to London.