| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] [Wh det] [vb mod] | 120 |
|
| 2 | [vb pp] [prep] [Wh det] [modal v] | 120 |
|
| 3 | [verb] [prep] [Wh det] could | 39 |
|
| 4 | [vb pp] [prep] [pron] could | 36 |
|
| 5 | [vb pp] [prep] [Wh det] could | 14 |
|
| 6 | [vb pp] [prep] [Wh det] could | 14 |
|
