| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be essential that [noun pl] | 29 |
|
| 2 | it be essential that [noun pl] | 29 |
|
| 3 | it be essential [conj] [noun pl] | 29 |
|
| 4 | it be essential [that] [noun pl] | 29 |
|
| 5 | it is essential [conj] [noun pl] | 27 |
|
