| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] have [verb] a [adj] impact | 12 |
|
| 2 | [noun pl] have [vb pp] a [adj] impact | 12 |
|
| 3 | [noun pl] have have a [adj] impact | 11 |
|
| 4 | [noun pl] have had a [adj] impact | 11 |
|
| 5 | [noun pl] have [verb] a [adj] impact | 8 |
|
| 6 | [noun pl] have [verb] a significant impact | 5 |
|
