| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] play a key role [prep] | 6 |
|
| 2 | [vb -s] play a key role [prep] | 6 |
|
| 3 | [vb -s] play a key role in | 6 |
|
| 4 | [vb -s] play a key role in | 6 |
|
| 5 | [vb -s] played a key role [prep] | 5 |
|
| 6 | has play a key role [prep] | 5 |
|
