| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] to | 9702 |
|
| 2 | should be [vb pp] [prep] | 9543 |
|
| 3 | should be [vb pp] [prep] | 9543 |
|
| 4 | should be [verb] to | 1848 |
|
| 5 | should be [vb pp] to | 1810 |
|
| 6 | should [be] [vb pp] to | 1810 |
|
