| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] not [been] [adj] | 162 |
|
| 2 | it [verb] [adv] [been] necessary | 14 |
|
| 3 | [pron] [verb] not [been] necessary | 8 |
|
| 4 | it [verb] not [be] necessary | 8 |
|
