| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] [adj] | 11817 |
|
| 2 | should be [vb pp] [prep] | 9543 |
|
| 3 | should be [vb pp] [adj] | 426 |
|
| 4 | should be [prep] [adj] | 116 |
|
