| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could be [vb pp] [prep] | 1526 |
|
| 2 | could be [vb pp] [prep] [be] | 166 |
|
| 3 | [pron] could be [vb pp] [be] | 15 |
|
| 4 | [pron] be [vb pp] [prep] [be] | 7 |
|
