| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it is [adj] that | 320 |
|
| 2 | [adv] it is [adj] that | 317 |
|
| 3 | [adv] it is essential that | 21 |
|
| 4 | [adv] it [be] essential that | 16 |
|
| 5 | [adv] it be essential that | 16 |
|
| 6 | [adv] it is essential [conj] | 15 |
|
| 7 | [adv] it [is] essential that | 15 |
|
| 8 | [adv] it is essential [that] | 15 |
|
| 9 | [adv] it is essential that | 15 |
|
| 10 | [adv] [pron] is essential that | 15 |
|
| 11 | [adv] it is essential that | 15 |
|
| 12 | [adv] it is essential that | 15 |
|
| 13 | [adv] [pers pn] is essential that | 15 |
|
