| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] happen to be | 565 |
|
| 2 | [adv] happen to be | 180 |
|
| 3 | [pron] [adv] happen to | 158 |
|
| 4 | [pron] [adv] to be | 152 |
|
