| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] when they | 517 |
|
| 2 | [vb pp] when they | 360 |
|
| 3 | [vb pp] [pron] they | 282 |
|
| 4 | [vb pp] [pron] when | 184 |
|
