| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [is] essential that [adj] | 84 |
|
| 2 | [is] essential that [adj] [noun sg] | 25 |
|
| 3 | [pers pn] [is] essential that [noun sg] | 15 |
|
| 4 | [pers pn] [is] that [adj] [noun sg] | 13 |
|
