| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have had a [adj] [noun] | 247 |
|
| 2 | [verb] had a [adj] effect | 140 |
|
| 3 | have had a [adj] effect | 140 |
|
| 4 | have had [art] [adj] effect | 25 |
|
| 5 | have [verb] a [adj] effect | 24 |
|
| 6 | have [vb pp] a [adj] effect | 24 |
|
| 7 | [vb infin] had a [adj] effect | 21 |
|
| 8 | have have a [adj] effect | 21 |
|
