| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] could [not/n't] [be] [vb pp] | 274 |
|
| 2 | [noun pl] could [be] [vb pp] [adj] | 49 |
|
| 3 | could [not/n't] [be] [vb pp] [adj] | 39 |
|
| 4 | [noun pl] could [not/n't] [be] [adj] | 14 |
|
