| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] a [noun sg] [verb] | 145 |
|
| 2 | could have [verb] a [noun sg] | 143 |
|
| 3 | have [verb] a [noun sg] [verb] | 134 |
|
| 4 | could have a [noun sg] [verb] | 12 |
|
