| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [be] [vb pp] | 3610 |
|
| 2 | what [modal v] [be] [vb pp] | 1399 |
|
| 3 | what could [be] [verb] | 178 |
|
| 4 | what could [be] [vb pp] | 174 |
|
