| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could and [vb mod] [vb infin] | 49 |
|
| 2 | could and should [verb] | 34 |
|
| 3 | could and [vb mod] have | 19 |
|
| 4 | could and [vb mod] have | 19 |
|
| 5 | could and would [verb] | 11 |
|
