| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have had a [adj] [noun] | 1645 |
|
| 2 | have [verb] a [adj] impact | 85 |
|
| 3 | have [vb pp] a [adj] impact | 84 |
|
| 4 | have had a [adj] impact | 70 |
|
| 5 | have had [art] [adj] impact | 68 |
|
| 6 | have have a [adj] impact | 67 |
|
| 7 | [verb] had a [adj] impact | 66 |
|
