| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | unless [pron] happen [prep] be | 18 |
|
| 2 | unless [pron] happen [prep] [be] | 18 |
|
| 3 | unless [pron] happen [prep] [be] | 18 |
|
| 4 | unless [pron] happen [prep] be | 18 |
|
