| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] to be | 18246 |
|
| 2 | to be [prep] | 9097 |
|
| 3 | [vb past] be [prep] | 4611 |
|
| 4 | [vb past] to [prep] | 414 |
|
