| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [that] [pron] could have [verb] | 64 |
|
| 2 | [to-vb] [that] [pron] [modal v] have [verb] | 46 |
|
| 3 | [to-vb] [that] [pron] could [verb] [verb] | 16 |
|
| 4 | [to-vb] [conj] [pron] could have [verb] | 14 |
|
