| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [prep] | 23915 |
|
| 2 | [vb past] it [prep] | 9735 |
|
| 3 | [vb past] it be | 6348 |
|
| 4 | [vb past] be [prep] | 4611 |
|
