| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [prep] be [adj] | 7 |
|
| 2 | could [prep] been [adj] | 5 |
|
| 3 | could of [be] [adj] | 5 |
|
| 4 | could [prep] [been] [adj] | 5 |
|
