| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [verb] [conj] [det] [noun pl] | 192 |
|
| 2 | could be [verb] [conj] [adj] [noun pl] | 46 |
|
| 3 | could be [verb] [conj] [det] [noun] | 44 |
|
| 4 | could [be] [verb] [conj] [det] [noun pl] | 22 |
|
