| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [verb] [prep] | 5467 |
|
| 2 | it is [vb pp] [prep] | 4737 |
|
| 3 | it be used [prep] | 304 |
|
| 4 | it [be] used [prep] | 304 |
|
| 5 | [pron] is used [prep] | 289 |
|
| 6 | it [is] used [prep] | 156 |
|
| 7 | it is use [prep] | 146 |
|
