| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb pp] [Wh det] [pers pn] could | 20 |
|
| 2 | have [vb pp] [Wh det] [pers pn] could | 18 |
|
| 3 | [vb past] [vb pp] [Wh det] [pers pn] could | 15 |
|
| 4 | had [vb pp] [Wh det] [pers pn] could | 14 |
|
| 5 | [vb pp] [prep] [Wh det] [pers pn] could | 10 |
|
| 6 | [vb pp] [prep] [Wh det] [pers pn] could | 10 |
|
| 7 | [vb pp] [Wh det] [pers pn] could [verb] | 13 |
|
| 8 | [vb pp] [Wh det] [pers pn] could [vb infin] | 8 |
|
| 9 | [vb pp] [Wh det] [pers pn] could [to-vb] | 5 |
|
