| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] a | 7885 |
|
| 2 | be [vb pp] [noun prp] | 1643 |
|
| 3 | be a [noun prp] | 1582 |
|
| 4 | [vb pp] a [noun prp] | 422 |
|
