| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [pers pn] is essential that [adj] | 6 |
|
| 2 | [adv] it [be] essential that [adj] | 6 |
|
| 3 | [adv] [pers pn] [is] essential that [adj] | 6 |
|
| 4 | [adv] [pers pn] be essential that [adj] | 6 |
|
| 5 | [adv] [pers pn] [be] essential that [adj] | 5 |
|
