| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] for | 2026 |
|
| 2 | it [be] necessary for | 187 |
|
| 3 | it be necessary for | 187 |
|
| 4 | it is necessary [prep] | 163 |
|
| 5 | [pron] is necessary for | 133 |
|
| 6 | it [is] necessary for | 116 |
|
| 7 | [pers pn] is necessary for | 104 |
|
| 8 | it is necessary for | 104 |
|
