| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] have had a [adj] impact | 23 |
|
| 2 | [noun sg] have have a [adj] impact | 21 |
|
| 3 | [noun sg] has have a [adj] impact | 16 |
|
| 4 | [noun sg] have have a major impact | 5 |
|
