| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] could [verb] | 2363 |
|
| 2 | but [modal v] [verb] | 1652 |
|
| 3 | [coord] could [verb] | 1225 |
|
| 4 | but could [verb] | 199 |
|
