| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary to provide a [adj] | 6 |
|
| 2 | [be] necessary to provide a [adj] | 6 |
|
| 3 | [is] necessary to provide a [adj] | 5 |
|
| 4 | is necessary to provide a [adj] | 5 |
|
