| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] [prep] | 9543 |
|
| 2 | [modal v] be [vb pp] for | 4958 |
|
| 3 | should be [verb] for | 750 |
|
| 4 | should be [vb pp] for | 686 |
|
| 5 | should [be] [vb pp] for | 686 |
|
| 6 | should [be] [vb pp] for | 686 |
|
