| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | did [pron] [adv] [verb] | 1257 |
|
| 2 | [verb] [pron] [adv] happen | 85 |
|
| 3 | [vb past] [pron] [adv] happen | 18 |
|
| 4 | do [pron] [adv] happen | 8 |
|
