| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could be [vb pp] | 3610 |
|
| 2 | [indef pn] [modal v] be [vb pp] | 908 |
|
| 3 | [indef pn] could be [verb] | 176 |
|
| 4 | [indef pn] could [be] [vb pp] | 162 |
|
| 5 | [indef pn] could be [vb pp] | 162 |
|
| 6 | [indef pn] could [be] [vb pp] | 162 |
|
