| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is essential that [det] [noun] | 37 |
|
| 2 | it [is] essential that [det] [noun pl] | 22 |
|
| 3 | it [is] essential that [det] [noun sg] | 14 |
|
| 4 | it [is] essential that all [noun] | 12 |
|
| 5 | it [is] essential that this [noun] | 8 |
|
| 6 | it [is] essential that these [noun] | 5 |
|
