| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] necessary for | 116 |
|
| 2 | it [is] for [noun sg] | 89 |
|
| 3 | [is] necessary for [noun sg] | 30 |
|
| 4 | it necessary for [noun sg] | 5 |
|
