| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [vb pp] back [prep] the | 13 |
|
| 2 | could [be] [verb] back [prep] the | 13 |
|
| 3 | could [be] back [prep] the [noun] | 8 |
|
| 4 | could [be] back [prep] the [noun sg] | 5 |
|
