| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is necessary for | 133 |
|
| 2 | it is necessary for | 104 |
|
| 3 | it is necessary for | 104 |
|
| 4 | [pers pn] is necessary for | 104 |
|
| 5 | [Wh det] is necessary for | 29 |
|
| 6 | which is necessary for | 21 |
|
| 7 | which is necessary for | 21 |
|
| 8 | what is necessary for | 5 |
|
| 9 | what is necessary for | 5 |
|
