| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [verb] [prep] [art] [noun sg] | 1507 |
|
| 2 | [modal v] [be] [verb] at [art] [noun sg] | 845 |
|
| 3 | could [be] [verb] at [art] [noun] | 49 |
|
| 4 | could [be] [verb] at [art] [noun sg] | 46 |
|
