| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [pers pn] could | 704 |
|
| 2 | [Wh det] [pers pn] could have | 83 |
|
| 3 | [prep] [pers pn] could have | 46 |
|
| 4 | [prep] [Wh det] could have | 36 |
|
