| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [pron] [art] [adj] | 119 |
|
| 2 | [modal v] [verb] [pron] [art] [det] | 108 |
|
| 3 | could [verb] [pron] [art] [det] | 21 |
|
