| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [not/n't] [vb infin] [verb] | 902 |
|
| 2 | [not/n't] [vb infin] and [verb] | 551 |
|
| 3 | should [vb infin] and [verb] | 308 |
|
| 4 | should [not/n't] [vb infin] and | 17 |
|
