I. be <现在式 am, are, is; 过去式 was, were; 过去分词 been; 现在分词 being> [强 biː; 弱 bı] 动词 不及物动词
II. be <现在式 am, are, is; 过去式 was, were; 过去分词 been; 现在分词 being> [强 biː; 弱 bı] 动词 助动词
| I | am |
|---|---|
| you | are |
| he/she/it | is |
| we | are |
| you | are |
| they | are |
| I | was |
|---|---|
| you | were |
| he/she/it | was |
| we | were |
| you | were |
| they | were |
| I | have | been |
|---|---|---|
| you | have | been |
| he/she/it | has | been |
| we | have | been |
| you | have | been |
| they | have | been |
| I | had | been |
|---|---|---|
| you | had | been |
| he/she/it | had | been |
| we | had | been |
| you | had | been |
| they | had | been |