| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [prep] a | 2077 |
|
| 2 | it [vb past] [prep] a | 1449 |
|
| 3 | it [vb past] be a | 655 |
|
| 4 | [vb past] be [prep] a | 356 |
|
| 5 | it [vb past] be [prep] | 348 |
|
