| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | did [not/n't] [adv] | 4310 |
|
| 2 | did [adv] happen | 209 |
|
| 3 | did [not/n't] happen | 205 |
|
| 4 | [not/n't] [adv] happen | 64 |
|
