| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | did [not/n't] [verb] for a | 77 |
|
| 2 | did [not/n't] [verb] [indef pn] for | 27 |
|
| 3 | [not/n't] [verb] [indef pn] for a | 15 |
|
