| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [pron] be [prep] | 4489 |
|
| 2 | [pron] be necessary [prep] | 383 |
|
| 3 | [coord] [pron] be necessary | 117 |
|
| 4 | [coord] be necessary [prep] | 15 |
|
