| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] a [noun sg] | 860 |
|
| 2 | [vb mod] a [noun sg] | 860 |
|
| 3 | could [art] [noun sg] | 364 |
|
| 4 | could a [noun] | 133 |
|
| 5 | could a [noun sg] | 127 |
|
