| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] has a key role in | 5 |
|
| 2 | [noun] has a key role in | 5 |
|
| 3 | has played a key role in | 5 |
|
| 4 | has play a key role in | 5 |
|
| 5 | has [vb pp] a key role in | 5 |
|
| 6 | has [verb] a key role in | 5 |
|
| 7 | has a key role to play in | 6 |
|
| 8 | has a key role [verb] in | 6 |
|
| 9 | has a key role [to-vb] in | 6 |
|
| 10 | has a key role play in | 6 |
|
