第1个回答 2012-04-03
举例说明
1.He is a teacher/here / tall/ 40 years old
2 He is crying
3.He can't be in the room now/ He will here tomorrow/
4.He has been to the bookshop
总结1.独自构成系表结构
2,放在情态动词或表示将来的助动词后再构成系表结构
3.have/has been to 特殊意义,去过
总之。句子中无其他行为动词时,必须有be动词。本回答被网友采纳