| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [be] necessary to use a | 10 |
|
| 2 | [pers pn] [be] necessary to use [adj] | 7 |
|
| 3 | [be] necessary to use a [adj] | 6 |
|
| 4 | [pers pn] [be] to use a [adj] | 5 |
|
