| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if not [verb] [modal v] [vb infin] | 5 |
|
| 2 | if [not/n't] [vb pp] [modal v] [vb infin] | 5 |
|
| 3 | if [not/n't] [verb] [vb mod] [vb infin] | 5 |
|
