| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it should [not/n't] [vb infin] | 226 |
|
| 2 | should [not/n't] [vb infin] do | 80 |
|
| 3 | it should [vb infin] do | 25 |
|
| 4 | it should [not/n't] do | 9 |
|
