| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [is] [conj] | 376 |
|
| 2 | [vb -s] happened [conj] | 104 |
|
| 3 | [vb -s] happened [is] | 63 |
|
| 4 | happened [is] [conj] | 38 |
|
