| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary [to-vb] the [adj] | 143 |
|
| 2 | be [adj] [to-vb] the [num] | 113 |
|
| 3 | be necessary [to-vb] [art] [num] | 8 |
|
| 4 | [be] necessary [to-vb] the [num] | 7 |
|
| 5 | be necessary [verb] the [num] | 7 |
|
