| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have shown a | 66 |
|
| 2 | [noun pl] have shown a | 61 |
|
| 3 | [noun sg] have shown a | 50 |
|
| 4 | [noun] has shown a | 34 |
|
| 5 | [noun] had shown a | 33 |
|
| 6 | [noun prp] have shown a | 18 |
|
| 7 | study have shown a | 15 |
|
| 8 | studies have shown a | 10 |
|
| 9 | study have shown a | 5 |
|
