| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] [pron] | 11785 |
|
| 2 | [vb past] [pron] could | 2700 |
|
| 3 | they [pron] could | 78 |
|
| 4 | they [vb past] could | 23 |
|
