| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] have a [adj] impact on | 8 |
|
| 2 | [vb past] have a [adj] impact on | 8 |
|
| 3 | [vb past] have a [adj] impact on | 8 |
|
| 4 | [vb past] had a [adj] impact on | 5 |
|
| 5 | had have a [adj] impact on | 5 |
|
