Be 动词的形式

be, is ,am, are, was, were, being been

• The man is back
• They are back
• He was back
• They were back
• They have been back

Be动词的用法

后面接名词，形容词，地点副词活短语补足语

• The man is a teacher
• Mary's new dresses are colorful.
• My mother was in the kitchen.

Be动词的练习

• They are teachers.
• He was a teacher before.
• He has been a teacher for three years