| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] necessary [to-vb] [adv] | 152 |
|
| 2 | [that] [pron] [is] necessary [to-vb] | 45 |
|
| 3 | [that] [pron] [is] [to-vb] [adv] | 7 |
|
