| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] could be | 1561 |
|
| 2 | [Wh det] could be | 1561 |
|
| 3 | [Wh det] could [be] | 1561 |
|
| 4 | which could [be] | 1187 |
|
| 5 | what could [be] | 368 |
|
