| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun sg] [modal v] have [verb] | 347 |
|
| 2 | [prep] [noun] could have [verb] | 69 |
|
| 3 | [prep] [noun sg] could [verb] [verb] | 52 |
|
| 4 | [prep] [noun sg] could have [verb] | 37 |
|
