| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [prep] | 82129 |
|
| 2 | be happen [prep] | 1260 |
|
| 3 | [be] happen [prep] | 1260 |
|
| 4 | [is] happen [prep] | 693 |
|
| 5 | is happen [prep] | 412 |
|
