| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which should [not/n't] [verb] | 26 |
|
| 2 | which should [not/n't] [vb infin] | 26 |
|
| 3 | which should not [verb] | 22 |
|
| 4 | which should [not/n't] have | 9 |
|
| 5 | which should [not/n't] have | 9 |
|
