| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [verb] a | 7816 |
|
| 2 | could [vb infin] [verb] | 7453 |
|
| 3 | could [verb] a | 4308 |
|
| 4 | could [vb infin] a | 4306 |
|
