| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could do | 2801 |
|
| 2 | who could [verb] | 1259 |
|
| 3 | who could [vb infin] | 1251 |
|
| 4 | who [modal v] do | 227 |
|
| 5 | who could do | 48 |
|
| 6 | [Wh pn] could do | 48 |
|
| 7 | who could do | 48 |
|
