| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [prep] [pron] | 605 |
|
| 2 | it [prep] [pron] [to-vb] | 215 |
|
| 3 | is [prep] [pron] [to-vb] | 161 |
|
| 4 | it is [prep] [to-vb] | 28 |
|
| 5 | it is [pron] [to-vb] | 27 |
|
