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be动词的用法总结_be动词的用法及练习

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  be动词的用法:做助动词

  助动词be 有两个基本用法,一是与谓语动词一起构成各种时态,二是构成被动语态。

  1、“be + 现在分词组”成各种进行式时态。例如:

  Tony's maid is washing his new car.

  The children are playing in the field.

  Samuel was eating when I came in.

  We have been living here since 1959.

  This time next day they will be sitting in the cinema.