| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i happen to be [v-ing] | 18 |
|
| 2 | i happen to be [v-ing] | 18 |
|
| 3 | i happen to be [v-ing] | 18 |
|
| 4 | i happened to be [v-ing] | 11 |
|
| 5 | i happen to be [v-ing] | 7 |
|
