| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [pron] should [verb] [prep] a | 5 |
|
| 2 | [vb pp] [pers pn] should [verb] [prep] a | 5 |
|
| 3 | [vb pp] [pron] should [vb infin] [prep] a | 5 |
|
| 4 | [vb pp] [pron] should [verb] [prep] a | 5 |
|
