| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] essential that [pers pn] [verb] [pos pn] | 6 |
|
| 2 | is essential [conj] [pers pn] [verb] [pos pn] | 6 |
|
| 3 | [is] essential [that] [pers pn] [verb] [pos pn] | 6 |
|
| 4 | [is] essential [conj] [pers pn] [vb base] [pos pn] | 6 |
|
| 5 | [is] essential that [pers pn] [verb] [pos pn] | 6 |
|
