| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [vb pp] a | 452 |
|
| 2 | to be [vb pp] [det] | 448 |
|
| 3 | to be a [det] | 31 |
|
| 4 | be [vb pp] a [det] | 19 |
|
