| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [pron] [prep] [art] | 1866 |
|
| 2 | be necessary [verb] [prep] [art] | 129 |
|
| 3 | necessary [verb] [pron] [prep] [art] | 48 |
|
| 4 | be necessary [verb] [pron] [prep] | 46 |
|
| 5 | be necessary [verb] [pron] [art] | 6 |
|
