| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [verb] [prep] | 535 |
|
| 2 | could have been [v-ing] [prep] | 29 |
|
| 3 | [modal v] have been talking [prep] | 11 |
|
| 4 | could [vb infin] been talking [prep] | 6 |
|
| 5 | could have been talking [prep] | 6 |
|
| 6 | could [verb] been talking [prep] | 6 |
|
| 7 | could have been talk [prep] | 5 |
|
| 8 | could have [be] talking [prep] | 5 |
|
| 9 | could have [been] talking [prep] | 5 |
|
| 10 | could have be talking [prep] | 5 |
|
