| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [vb pp] a crucial role | 11 |
|
| 2 | have [vb pp] a crucial role | 11 |
|
| 3 | have played a crucial role | 11 |
|
| 4 | has [vb pp] a crucial role | 6 |
|
