| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [pron] could [vb infin] | 501 |
|
| 2 | [det] [prep] [pron] could [vb infin] | 100 |
|
| 3 | [det] [prep] [Wh det] could [vb infin] | 8 |
|
| 4 | [det] [prep] [Wh det] [pron] could | 7 |
|
