| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] at the back [prep] | 63 |
|
| 2 | [vb past] at the back [prep] | 63 |
|
| 3 | [vb past] at the back [prep] | 60 |
|
| 4 | [vb past] at the back of | 60 |
|
| 5 | [vb past] at the back of | 60 |
|
| 6 | sat at the back [prep] | 9 |
|
| 7 | stood at the back [prep] | 8 |
|
| 8 | looked at the back [prep] | 7 |
|
