| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it is [adv] [adj] [to-vb] | 431 |
|
| 2 | [coord] it is [adv] [adj] [to-vb] | 398 |
|
| 3 | [conj] it is [adv] necessary [to-vb] | 50 |
|
| 4 | [coord] it is [adv] necessary [to-vb] | 40 |
|
| 5 | [coord] it be [adv] necessary [to-vb] | 36 |
|
| 6 | [coord] it [be] [adv] necessary [to-vb] | 36 |
|
| 7 | [coord] it is [adv] necessary [to-vb] | 28 |
|
| 8 | [coord] it is [adv] necessary [verb] | 28 |
|
| 9 | [coord] it [is] [adv] necessary [to-vb] | 28 |
|
| 10 | [coord] [pron] is [adv] necessary [to-vb] | 28 |
|
