| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] [conj] | 1529 |
|
| 2 | could be [vb pp] [conj] | 1515 |
|
| 3 | [modal v] be argued [conj] | 552 |
|
| 4 | could [be] argued [conj] | 222 |
|
| 5 | could be argue [conj] | 222 |
|
