| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] | 7113 |
|
| 2 | [pers pn] could be [vb pp] | 2226 |
|
| 3 | [pers pn] could be [prep] | 330 |
|
| 4 | [pers pn] be [vb pp] [prep] | 323 |
|
| 5 | [pers pn] could [vb pp] [prep] | 5 |
|
