| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it is [adv] necessary | 39 |
|
| 2 | and it is [adv] necessary | 23 |
|
| 3 | but it is [adv] necessary | 15 |
|
| 4 | [coord] it is also necessary | 7 |
|
