| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it [is] [adj] | 477 |
|
| 2 | when it [is] [adj] | 400 |
|
| 3 | [conj] it [is] necessary | 297 |
|
| 4 | when it [be] necessary | 26 |
|
| 5 | when it [is] necessary | 23 |
|
| 6 | when [pron] [is] necessary | 23 |
|
| 7 | when it [is] necessary | 23 |
|
| 8 | when [pers pn] [is] necessary | 23 |
|
