| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that [vb base] been [verb] | 1026 |
|
| 2 | study [vb base] been [verb] | 111 |
|
| 3 | study that [vb base] [verb] | 19 |
|
| 4 | study that [vb base] been | 11 |
|
