| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] [prep] [pron] [to-vb] | 285 |
|
| 2 | it is [adj] [prep] [pron] [to-vb] | 265 |
|
| 3 | it [be] necessary [prep] [pron] [to-vb] | 48 |
|
| 4 | it be necessary [prep] [pron] [to-vb] | 48 |
|
| 5 | it [is] necessary [prep] [pron] [to-vb] | 31 |
|
| 6 | [pron] is necessary [prep] [pron] [to-vb] | 26 |
|
| 7 | [pers pn] is necessary [prep] [pron] [to-vb] | 25 |
|
| 8 | it is necessary [prep] [pron] [to-vb] | 25 |
|
| 9 | it is necessary [prep] [pron] [verb] | 25 |
|
| 10 | it is necessary [prep] [pron] [to-vb] | 25 |
|
| 11 | it is necessary [prep] [pron] [to-vb] | 25 |
|
