| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [pers pn] is [verb] | 1285 |
|
| 2 | [pers pn] is necessary [verb] | 1050 |
|
| 3 | [Wh det] is necessary [verb] | 35 |
|
| 4 | [Wh det] [pers pn] is necessary | 13 |
|
