| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [vb pp] a [noun sg] | 514 |
|
| 2 | could [be] [vb pp] [art] [noun sg] | 98 |
|
| 3 | could [be] [verb] a [noun sg] | 82 |
|
| 4 | could [be] [vb pp] a [noun] | 58 |
|
| 5 | could [be] [vb pp] a [noun sg] | 55 |
|
