| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [conj] [verb] | 12943 |
|
| 2 | could [vb infin] [verb] | 7453 |
|
| 3 | could [vb infin] [conj] | 2900 |
|
| 4 | could [conj] [verb] | 130 |
|
