| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [pron] | 590 |
|
| 2 | they [vb mod] [pron] | 207 |
|
| 3 | they [modal v] [pron] | 207 |
|
| 4 | they could [pron] | 25 |
|
