| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [be] [adj] | 3569 |
|
| 2 | could have [be] [adj] | 346 |
|
| 3 | could [vb infin] [be] [adj] | 205 |
|
| 4 | could [verb] [be] [adj] | 205 |
|
| 5 | could have [be] [adj] | 178 |
|
