| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] [been] [vb pp] [prep] | 667 |
|
| 2 | [vb past] [been] [vb pp] [prep] [det] | 612 |
|
| 3 | it [vb past] [vb pp] [prep] [det] | 48 |
|
| 4 | it [vb past] [been] [prep] [det] | 15 |
|
| 5 | it [vb past] [been] [vb pp] [det] | 12 |
|
