| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [vb infin] | 45138 |
|
| 2 | who [modal v] [vb infin] | 8998 |
|
| 3 | [Wh pn] could [vb infin] | 1264 |
|
| 4 | who could [verb] | 1259 |
|
| 5 | who could [vb infin] | 1251 |
|
