| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [be] [vb pp] [prep] | 886 |
|
| 2 | could [be] [vb pp] [prep] [adj] | 647 |
|
| 3 | [not/n't] [be] [vb pp] [prep] [adj] | 616 |
|
| 4 | could [not/n't] [be] [vb pp] [adj] | 39 |
|
