| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [prep] [pron] [verb] | 42 |
|
| 2 | it necessary [prep] [pron] [verb] | 9 |
|
| 3 | it 's necessary [prep] [pron] | 8 |
|
| 4 | 's necessary [prep] [pron] [verb] | 6 |
|
