| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is for [pers pn] | 110 |
|
| 2 | it is necessary for | 104 |
|
| 3 | is necessary for [pers pn] | 28 |
|
| 4 | it necessary for [pers pn] | 11 |
|
