| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [vb pp] a major contribution to | 7 |
|
| 2 | [vb -s] [verb] a major contribution to | 7 |
|
| 3 | has [verb] a major contribution to | 7 |
|
| 4 | [vb -s] made a major contribution to | 7 |
|
| 5 | [vb -s] make a major contribution to | 7 |
|
| 6 | [vb -s] [verb] a major contribution to | 7 |
|
