| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [verb] a [adj] [noun] | 1028 |
|
| 2 | could have [verb] [art] [adj] [noun] | 156 |
|
| 3 | could [verb] [verb] a [adj] [noun] | 126 |
|
| 4 | could have [verb] a [adj] [noun] | 111 |
|
