| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | happen was | 231 |
|
| 2 | happened [was/were] | 151 |
|
| 3 | happened [was/were] | 38 |
|
| 4 | happening [was/were] | 22 |
|
| 5 | happen [was/were] | 11 |
|
| 6 | happen [was/were] | 8 |
|
| 7 | happen were | 8 |
|
| 8 | to happen [was/were] | 8 |
|
