| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] necessary for [pron] [to-vb] | 31 |
|
| 2 | [pers pn] [is] necessary for [pers pn] [to-vb] | 27 |
|
| 3 | [pers pn] is necessary for [pron] [to-vb] | 25 |
|
| 4 | [pers pn] [is] necessary for we [to-vb] | 10 |
|
| 5 | [pers pn] [is] necessary for us [to-vb] | 10 |
|
| 6 | [pers pn] [is] necessary for me [to-vb] | 8 |
|
| 7 | [pers pn] [is] necessary for i [to-vb] | 8 |
|
| 8 | [pers pn] 's necessary for [pron] [to-vb] | 6 |
|
