| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it should [be] [vb pp] to | 66 |
|
| 2 | [vb base] it should [be] [vb pp] | 47 |
|
| 3 | [vb base] it [be] [vb pp] to | 16 |
|
| 4 | [vb base] should [be] [vb pp] to | 11 |
|
