| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [prep] [art] | 213575 |
|
| 2 | be necessary [verb] [art] | 909 |
|
| 3 | be necessary [prep] [art] | 527 |
|
| 4 | be necessary [verb] [prep] | 290 |
|
| 5 | necessary [verb] [prep] [art] | 208 |
|
