| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary [subord] | 309 |
|
| 2 | be [subord] [noun sg] | 287 |
|
| 3 | necessary [subord] [noun sg] | 41 |
|
| 4 | be necessary [noun sg] | 11 |
|
