| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [vb infin] [art] | 7521 |
|
| 2 | [Wh det] could [vb infin] [art] | 352 |
|
| 3 | what [modal v] [vb infin] [art] | 105 |
|
| 4 | what could [verb] [art] | 13 |
|
| 5 | what could [vb infin] [art] | 13 |
|
| 6 | what could [vb infin] [art] | 13 |
|
