| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [det] [noun pl] | 1673 |
|
| 2 | be necessary [verb] [det] | 214 |
|
| 3 | be necessary [verb] [noun pl] | 114 |
|
| 4 | necessary [verb] [det] [noun pl] | 60 |
|
