| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [vb pp] [to-vb] [prep] | 2616 |
|
| 2 | [was/were] [vb pp] back [prep] | 575 |
|
| 3 | [vb pp] [to-vb] back [prep] | 224 |
|
| 4 | [was/were] [vb pp] [to-vb] back | 61 |
|
| 5 | [was/were] [to-vb] back [prep] | 41 |
|
