| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has made a [adj] contribution | 28 |
|
| 2 | have made a significant contribution | 15 |
|
| 3 | [verb] made a significant contribution | 15 |
|
| 4 | has made a significant [noun] | 9 |
|
| 5 | has make a significant contribution | 5 |
|
| 6 | [vb -s] made a significant contribution | 5 |
|
| 7 | has made [art] significant contribution | 5 |
|
| 8 | has [verb] a significant contribution | 5 |
|
| 9 | has [vb pp] a significant contribution | 5 |
|
| 10 | has made [art] significant contribution | 5 |
|
| 11 | has made a significant contribution | 5 |
|
