| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] could have [be] talking | 5 |
|
| 2 | [pron] could have [be] talking | 5 |
|
| 3 | could have [be] talking [prep] | 6 |
|
| 4 | could have [be] talking [prep] | 6 |
|
| 5 | could have [be] talking about | 5 |
|
| 6 | could have [be] talking about | 5 |
|
