| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] necessary for the development | 5 |
|
| 2 | be necessary for the development | 5 |
|
| 3 | necessary for the development of | 12 |
|
| 4 | necessary for the development of | 12 |
|
| 5 | necessary for the development [prep] | 12 |
|
| 6 | necessary for the development [prep] | 12 |
|
