| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] for this | 810 |
|
| 2 | necessary for [adj] | 292 |
|
| 3 | necessary for [det] | 125 |
|
| 4 | necessary [prep] this | 45 |
|
| 5 | necessary [prep] this | 45 |
|
| 6 | necessary for this | 21 |
|
| 7 | necessary for this | 21 |
|
