| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have had a [adj] impact | 33 |
|
| 2 | [noun sg] have had a [adj] impact | 23 |
|
| 3 | [noun] has had a [adj] impact | 21 |
|
| 4 | [noun] have had a [adj] impact | 13 |
|
| 5 | [noun pl] have had a [adj] impact | 11 |
|
| 6 | [noun] have had a major impact | 9 |
|
| 7 | [noun] have had a significant impact | 7 |
|
