| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [vb pp] [prep] | 2189 |
|
| 2 | [adv] [be] [vb pp] [prep] [adj] | 1725 |
|
| 3 | could [be] [vb pp] [prep] [adj] | 647 |
|
| 4 | could [adv] [be] [vb pp] [adj] | 82 |
|
