| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [be] [vb pp] [adv] to | 142 |
|
| 2 | should [be] [vb pp] to [be] | 72 |
|
| 3 | [be] [vb pp] [adv] to [be] | 46 |
|
