| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have an important role to play in | 40 |
|
| 2 | [vb base] an important role to play in | 18 |
|
| 3 | have an important role to play in | 18 |
|
| 4 | has an important role to play in | 11 |
|
| 5 | [vb -s] an important role to play in | 11 |
|
| 6 | had an important role to play in | 6 |
|
| 7 | [vb past] an important role to play in | 6 |
|
