| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] to be | 18246 |
|
| 2 | [adv] to be | 12807 |
|
| 3 | [adv] [vb past] to | 5168 |
|
| 4 | [adv] [vb past] be | 1061 |
|
