| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] necessary for [pron] | 53 |
|
| 2 | be necessary for [pron] | 34 |
|
| 3 | [adv] be necessary for | 29 |
|
| 4 | [adv] be for [pron] | 22 |
|
