| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is not necessary [prep] [art] | 24 |
|
| 2 | it is not necessary [prep] [art] | 24 |
|
| 3 | it is not necessary for [art] | 23 |
|
| 4 | it is not necessary for [art] | 23 |
|
| 5 | it is not necessary [prep] the | 18 |
|
| 6 | it is not necessary [prep] the | 18 |
|
