| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they 've [be] [vb pp] | 332 |
|
| 2 | once they [be] [vb pp] | 84 |
|
| 3 | once they 've [vb pp] | 53 |
|
| 4 | once they 've [be] | 12 |
|
