| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be behind | 24 |
|
| 2 | [modal v] be behind | 24 |
|
| 3 | [modal v] [be] behind | 24 |
|
| 4 | [vb mod] [be] behind | 24 |
|
| 5 | might [be] behind | 5 |
|
| 6 | might [be] behind | 5 |
|
