| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] empty [prep] [det] | 6 |
|
| 2 | [vb past] been empty [prep] [det] | 6 |
|
| 3 | [vb past] [been] empty [prep] [det] | 6 |
|
| 4 | [vb past] [been] empty for [det] | 6 |
|
