| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is [prep] [noun prp] | 393 |
|
| 2 | [pron] happen [prep] [noun prp] | 376 |
|
| 3 | [pron] is happen [prep] | 339 |
|
| 4 | is happen [prep] [noun prp] | 49 |
|
