| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [been] [verb] | 1153 |
|
| 2 | could [verb] [been] [vb pp] | 1056 |
|
| 3 | [modal v] [verb] [been] put | 60 |
|
| 4 | could [verb] [been] put | 22 |
|
| 5 | could [verb] [be] put | 21 |
|
