| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] vital that [det] [noun pl] | 11 |
|
| 2 | it be vital that [det] [noun pl] | 11 |
|
| 3 | it is vital that [det] [noun pl] | 10 |
|
| 4 | it [is] vital that [det] [noun pl] | 10 |
|
| 5 | it [be] vital that all [noun pl] | 5 |
|
