| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [art] [adj] effect | 425 |
|
| 2 | [modal v] have had [art] [adj] | 193 |
|
| 3 | have had [art] [adj] effect | 156 |
|
| 4 | [modal v] have had [art] effect | 22 |
|
