| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is not necessary [verb] [adj] [noun pl] | 5 |
|
| 2 | [is] not necessary [verb] [adj] [noun pl] | 5 |
|
| 3 | [be] not necessary [verb] [adj] [noun pl] | 5 |
|
| 4 | [be] not necessary [to-vb] [adj] [noun pl] | 5 |
|
| 5 | be not necessary [verb] [adj] [noun pl] | 5 |
|
