| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been on | 129 |
|
| 2 | could have been [prep] | 99 |
|
| 3 | could have been [prep] | 99 |
|
| 4 | could have been on | 10 |
|
| 5 | could [verb] been on | 10 |
|
| 6 | could have be on | 10 |
|
| 7 | could have [be] on | 10 |
|
| 8 | could have [been] on | 10 |
|
