| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [is] [not/n't] | 2168 |
|
| 2 | [is] [not/n't] necessary | 440 |
|
| 3 | [adv] [not/n't] necessary | 20 |
|
| 4 | [adv] [is] necessary | 10 |
|
