| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] is not necessary [to-vb] | 5 |
|
| 2 | [det] is not necessary to safeguard | 5 |
|
| 3 | [det] is not necessary [verb] | 5 |
|
| 4 | this is not necessary [verb] | 5 |
|
| 5 | [det] is not necessary safeguard | 5 |
|
