时间:2019-02-06 作者:英语课 分类:英文语法词汇


英语课

   be动词(am、is、are)+not、


  情态动词can+ not、
  助动词(do、does) + not
  如何将一个肯定的陈述句改为否定句:
  1、看句中有无be动词,如有,直接在be动词后+ not。
  2、看句中有无情态动词,如有,直接在情态动词后+ not。
  3、如上述二者都没有,就应用助动词+ not。分四个步骤:
  (1)肯定陈述句中本来是没有助动词的,要加上去,位置在主语(某人或某物)后,动词前。
  (2)确定助动词用do、does,根据句中动词,动词是原形的助动词就用do,动词是第三人称单数的助动词就用does,
  (3)在助动词后加not。
  (4)原句中动词假如发生变化就要恢复成原形。
  强调一点,有some的要考虑是否要用any。
  be 的用法口诀
  我用am,你用are,is连着他,她,它;
  单数名词用is,复数名词全用are。
  变疑问,往前提,句末问号莫丢弃。
  变否定,更容易,be后not莫忘记。
  疑问否定任你变,句首大写莫迟疑。
  be动词的用法:be (be/is/are/am/was/were)

标签: Be动词
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