| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] essential that [noun pl] | 29 |
|
| 2 | [pers pn] be essential that [noun pl] | 29 |
|
| 3 | [pers pn] [is] essential that [noun pl] | 28 |
|
| 4 | [pers pn] is essential that [noun pl] | 27 |
|
