| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [conj] [verb] | 86 |
|
| 2 | [pron] could [verb] [vb infin] | 50 |
|
| 3 | could [conj] [verb] [vb infin] | 47 |
|
| 4 | [pron] [conj] [verb] [vb infin] | 34 |
|
