“Be+现在分词”以组成进行式时态(Continuous Tenses),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.
形式
有不同的be动词,基本上为:
am,is,are,was,were,been,being,be。
被动语态
被动语态的基本结构为be+done(Be动词+动词过去分词)
一般现在时:am/is/are+done
一般过去时:was/were+done
一般将来时:will+be+done
现在进行时:am/is/are+being+done
过去进行时:was/were+being+done
现在完成时:have/has+been+done
过去完成时:had+been+done
一般构句
代词/专有名词+be+普通名词(如我们是亲兄弟)
代词+be+专有名词(如我是爱丽丝)
代词/专有名词+be+物主代词+普通名词(如我是你的亲姐妹)
当“be”要在祈使句中出现时,陈述句可借助助动词“do”,否定句必须在前加上助动词“don't”,如:
Don't be silly!
Do be obedient!
Be careful!
Don'tbe a fool!