| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] hours before [be] | 13 |
|
| 2 | [num] hours before [be] | 12 |
|
| 3 | hours before [be] [vb pp] | 15 |
|
| 4 | hours before [be] [verb] | 15 |
|
