| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] [prep] a | 445 |
|
| 2 | i should [vb infin] [prep] | 271 |
|
| 3 | i should [vb infin] a | 100 |
|
| 4 | i [vb infin] [prep] a | 59 |
|
