| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pron] could [verb] | 13400 |
|
| 2 | [conj] [pron] could [vb infin] | 13349 |
|
| 3 | [conj] [pron] [modal v] have | 10942 |
|
| 4 | [conj] [pron] could have | 1320 |
|
