| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have had a [adj] [noun] | 187 |
|
| 2 | [vb mod] have [vb pp] a [adj] impact | 9 |
|
| 3 | [vb mod] have [verb] a [adj] impact | 9 |
|
| 4 | [vb mod] have had [art] [adj] impact | 7 |
|
| 5 | [vb mod] have had [art] [adj] impact | 7 |
|
| 6 | [modal v] have had a [adj] impact | 6 |
|
| 7 | [vb mod] have have a [adj] impact | 6 |
|
| 8 | [vb mod] have had a [adj] impact | 6 |
|
| 9 | [vb mod] [verb] had a [adj] impact | 6 |
|
