| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] [that] [noun] [verb] | 311 |
|
| 2 | it be essential [that] [noun] [verb] | 22 |
|
| 3 | it [be] essential [that] [noun] [verb] | 22 |
|
| 4 | it [is] essential [that] [noun] [verb] | 20 |
|
| 5 | [pers pn] is essential [that] [noun] [verb] | 20 |
|
| 6 | it is essential [conj] [noun] [verb] | 20 |
|
| 7 | it is essential [that] [noun] [verb] | 20 |
|
| 8 | [pron] is essential [that] [noun] [verb] | 20 |
|
