| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [pron] have [verb] | 285 |
|
| 2 | could [pers pn] have [verb] | 276 |
|
| 3 | [modal v] you have [verb] | 242 |
|
| 4 | could you [verb] [verb] | 57 |
|
| 5 | could you [vb infin] [verb] | 56 |
|
| 6 | could you have [verb] | 31 |
|
| 7 | could you have [verb] | 31 |
|
