| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has a vital role | 8 |
|
| 2 | [noun sg] has a vital role | 6 |
|
| 3 | has a vital role [to-vb] | 8 |
|
| 4 | has a vital role play | 8 |
|
| 5 | has a vital role [verb] | 8 |
|
| 6 | has a vital role to play | 8 |
|
