| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [pers pn] could [vb infin] | 474 |
|
| 2 | [det] [prep] [pers pn] could [vb infin] | 84 |
|
| 3 | [det] [prep] [Wh det] could [vb infin] | 8 |
|
| 4 | [det] [prep] [Wh det] [pers pn] could | 7 |
|
