| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] for [pron] | 195 |
|
| 2 | is [adv] necessary for | 118 |
|
| 3 | [adv] necessary for [pron] | 53 |
|
| 4 | is necessary for [pron] | 45 |
|
