| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] essential that [det] | 65 |
|
| 2 | it [be] essential that [noun sg] | 18 |
|
| 3 | [be] essential that [det] [noun sg] | 17 |
|
| 4 | it [be] that [det] [noun sg] | 10 |
|
