| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] [adj] | 38807 |
|
| 2 | could be [vb pp] [prep] | 7114 |
|
| 3 | could be [vb pp] [adj] | 239 |
|
| 4 | could be [prep] [adj] | 83 |
|
