| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it necessary for [pron] | 14 |
|
| 2 | [verb] it 's for [pron] | 9 |
|
| 3 | it 's necessary for [pron] | 8 |
|
| 4 | [verb] it 's necessary for | 7 |
|
