| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] [adj] | 647 |
|
| 2 | [conj] could be [vb pp] [prep] | 547 |
|
| 3 | [conj] be [vb pp] [prep] [adj] | 64 |
|
| 4 | [conj] could be [vb pp] [adj] | 19 |
|
| 5 | [conj] could be [prep] [adj] | 6 |
|
