| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [vb pp] [art] important role | 18 |
|
| 2 | has [verb] an important role | 18 |
|
| 3 | has play [art] important role | 17 |
|
| 4 | has played [art] important role | 17 |
|
