| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] in | 995 |
|
| 2 | be [vb pp] in [pron] | 828 |
|
| 3 | could be [vb pp] [pron] | 71 |
|
| 4 | could be in [pron] | 17 |
|
