| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] if they do [not/n't] [vb infin] | 20 |
|
| 2 | [vb pp] if they do not [vb infin] | 16 |
|
| 3 | [vb pp] if they do [not/n't] [vb infin] | 12 |
|
| 4 | [vb pp] if they did [not/n't] [vb infin] | 8 |
|
