| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that is necessary [prep] | 17 |
|
| 2 | that is necessary [prep] | 17 |
|
| 3 | that is necessary [prep] | 17 |
|
| 4 | that is necessary for | 10 |
|
| 5 | that is necessary for | 10 |
|
