| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] [verb] | 8047 |
|
| 2 | it [vb past] [vb pp] | 4608 |
|
| 3 | [pron] [vb past] become | 1155 |
|
| 4 | it [verb] become | 775 |
|
| 5 | it [vb past] become | 316 |
|
