| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] [vb pp] [conj] | 239 |
|
| 2 | should [vb infin] [vb pp] a | 223 |
|
| 3 | [vb infin] [vb pp] [conj] a | 64 |
|
| 4 | should [vb infin] [conj] a | 48 |
|
