| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | played an important role in | 50 |
|
| 2 | plays an important role in | 40 |
|
| 3 | play an important role in | 38 |
|
| 4 | played an important role in | 31 |
|
| 5 | play an important role in | 29 |
|
| 6 | to play an important role in | 22 |
|
| 7 | playing an important role in | 8 |
|
