| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which has [verb] a [adj] effect | 7 |
|
| 2 | which has [verb] [art] [adj] effect | 7 |
|
| 3 | which has [verb] [art] [adj] effect | 7 |
|
| 4 | which has [vb pp] [art] [adj] effect | 7 |
|
| 5 | which has had [art] [adj] effect | 6 |
|
| 6 | which has have [art] [adj] effect | 6 |
|
| 7 | which has [verb] a [adj] effect | 5 |
|
