| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] [det] [noun] | 669 |
|
| 2 | [vb past] [been] [det] [noun] | 288 |
|
| 3 | it [vb past] [been] [noun] | 144 |
|
| 4 | it [vb past] [been] [det] | 53 |
|
