| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [verb] [pron] | 1638 |
|
| 2 | [conj] could [verb] [pron] | 308 |
|
| 3 | [conj] could [vb infin] [pron] | 308 |
|
| 4 | [conj] could [vb infin] [verb] | 239 |
|
| 5 | [conj] [vb infin] [verb] [pron] | 138 |
|
