| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] at the [noun sg] | 91 |
|
| 2 | should [be] [vb pp] at the outset | 19 |
|
| 3 | should [be] [vb pp] at the end | 11 |
|
| 4 | should [be] [vb pp] at the time | 8 |
|
