| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [vb pp] [art] significant role in | 12 |
|
| 2 | have [verb] [art] significant role in | 12 |
|
| 3 | have play [art] significant role in | 12 |
|
| 4 | have played [art] significant role in | 12 |
|
