“be动词”是英语中最基本的动词之一，包括 am, is, are, was, were。它们用于表示状态、身份或位置。
| 时态 | 人称 | be动词形式 | 例句 |
| 一般现在时 | I | am | I am a student. |
| 一般现在时 | He/She/It | is | She is a teacher. |
| 一般现在时 | We/You/They | are | They are friends. |
| 一般过去时 | I/He/She/It | was | I was late. |
| 一般过去时 | We/You/They | were | We were happy. |
be动词常用于构成进行时和被动语态，如：
- I am studying.（进行时）
- The book was written by him.（被动语态）
掌握be动词的正确用法，有助于提高英语表达的准确性。
