| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [pers pn] is [prep] | 1738 |
|
| 2 | [pers pn] is necessary [prep] | 164 |
|
| 3 | [subord] [pers pn] is necessary | 130 |
|
| 4 | [subord] is necessary [prep] | 19 |
|
