| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have had a [adj] | 203 |
|
| 2 | [modal v] have a [adj] impact | 122 |
|
| 3 | have had a [adj] impact | 60 |
|
| 4 | [modal v] have had [adj] impact | 5 |
|
