| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] happened [prep] be | 74 |
|
| 2 | it [adv] [prep] be | 38 |
|
| 3 | it happened [prep] be | 28 |
|
| 4 | it [adv] happened [prep] | 18 |
|
