| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [verb] | 18437 |
|
| 2 | it is [vb pp] | 14689 |
|
| 3 | it [be] used | 600 |
|
| 4 | it be used | 600 |
|
| 5 | [pron] is used | 582 |
|
| 6 | it is use | 368 |
|
| 7 | it [is] used | 365 |
|
