| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [adv] necessary for the | 11 |
|
| 2 | was [adv] necessary for the | 10 |
|
| 3 | [was/were] [not/n't] necessary for the | 7 |
|
| 4 | [was/were] not necessary for the | 7 |
|
| 5 | [was/were] not necessary for the | 7 |
|
