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