| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [vb infin] [pron] [prep] [art] | 474 |
|
| 2 | they [modal v] [vb infin] [pron] [prep] [art] | 277 |
|
| 3 | they could [verb] [pron] [prep] [art] | 37 |
|
