| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who happen to be | 111 |
|
| 2 | who happen to be | 111 |
|
| 3 | who happened to be | 56 |
|
| 4 | who happens to be | 30 |
|
| 5 | who happen to be | 25 |
|
