| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] [conj] | 3439 |
|
| 2 | it [conj] [modal v] | 185 |
|
| 3 | [vb past] [conj] [modal v] | 181 |
|
| 4 | it [vb past] [modal v] | 37 |
|
