| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [modal v] [adv] | 163449 |
|
| 2 | [pron] [modal v] happen | 1819 |
|
| 3 | [pron] [adv] happen | 954 |
|
| 4 | [modal v] [adv] happen | 703 |
|
