| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [prep] [Wh det] could [vb infin] | 8 |
|
| 2 | [num] [prep] [Wh det] could [vb infin] | 6 |
|
| 3 | [det] [num] [prep] [Wh det] could | 5 |
|
