| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [art] | 63354 |
|
| 2 | [be] necessary [verb] | 2689 |
|
| 3 | necessary [verb] [art] | 1701 |
|
| 4 | [be] necessary [art] | 8 |
|
