| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have had a significant impact [prep] | 9 |
|
| 2 | have have a significant impact [prep] | 9 |
|
| 3 | have have a significant impact [prep] | 9 |
|
| 4 | have have a significant impact on | 8 |
|
| 5 | have have a significant impact on | 8 |
|
| 6 | has have a significant impact [prep] | 5 |
|
