| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] [prep] [det] | 5309 |
|
| 2 | should be [vb pp] [prep] [adj] | 1811 |
|
| 3 | should be [verb] [prep] [det] | 763 |
|
| 4 | should [be] [vb pp] [prep] [det] | 726 |
|
