| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not have [been] [adj] for | 8 |
|
| 2 | could not have [been] [adj] for | 6 |
|
| 3 | could not have [been] [vb pp] for | 6 |
|
| 4 | could not have [been] [verb] for | 6 |
|
