| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] could [be] [vb pp] [prep] | 483 |
|
| 2 | could [be] [vb pp] [prep] [pron] | 358 |
|
| 3 | [adj] [be] [vb pp] [prep] [pron] | 16 |
|
| 4 | [adj] could [be] [prep] [pron] | 6 |
|
