| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] could be [vb pp] | 671 |
|
| 2 | [noun] could be [vb pp] [adj] | 120 |
|
| 3 | [prep] [noun] could be [adj] | 59 |
|
| 4 | [prep] [noun] be [vb pp] [adj] | 7 |
|
