| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was for [pron] [to-vb] | 21 |
|
| 2 | it was necessary for [pron] | 17 |
|
| 3 | was necessary for [pron] [to-vb] | 16 |
|
| 4 | it necessary for [pron] [to-vb] | 9 |
|
