| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [vb pp] [adj] | 2345 |
|
| 2 | [modal v] be [vb pp] [adj] | 2345 |
|
| 3 | should be [vb pp] [adj] | 621 |
|
| 4 | should be [verb] [adj] | 489 |
|
| 5 | should [be] [vb pp] [adj] | 426 |
|
| 6 | should be [vb pp] [adj] | 426 |
|
