| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [verb] [prep] | 535 |
|
| 2 | could have been [verb] [prep] | 535 |
|
| 3 | [modal v] have been [verb] for | 286 |
|
| 4 | could [vb infin] been [verb] for | 69 |
|
| 5 | could have been [verb] for | 69 |
|
| 6 | could [verb] been [verb] for | 69 |
|
| 7 | could have been [verb] for | 67 |
|
| 8 | could have be [verb] for | 67 |
|
| 9 | could have [be] [verb] for | 67 |
|
| 10 | could have [been] [verb] for | 67 |
|
