| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] it [is] essential [that] [adj] | 8 |
|
| 2 | [noun] it is essential [that] [adj] | 8 |
|
| 3 | [noun] it [be] essential that [adj] | 8 |
|
| 4 | [noun] it be essential [that] [adj] | 8 |
|
| 5 | [noun] it [be] essential [that] [det] | 7 |
|
