| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has made a major contribution to | 7 |
|
| 2 | has [verb] a major contribution to | 7 |
|
| 3 | has make a major contribution to | 7 |
|
| 4 | has [vb pp] a major contribution to | 7 |
|
| 5 | has [verb] a major contribution to | 7 |
|
