| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is [adv] necessary | 681 |
|
| 2 | [pron] is [adv] for | 256 |
|
| 3 | [pron] is necessary for | 133 |
|
| 4 | is [adv] necessary for | 118 |
|
| 5 | [pron] [adv] necessary for | 8 |
|
