| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [vb pp] back to | 20 |
|
| 2 | [modal v] [verb] [vb pp] back to | 20 |
|
| 3 | [vb mod] [verb] [vb pp] back to | 20 |
|
| 4 | [modal v] have [vb pp] back to | 19 |
|
| 5 | [modal v] have [vb pp] back to | 18 |
|
| 6 | [modal v] [verb] gone back to | 8 |
|
| 7 | would [verb] [vb pp] back to | 6 |
|
| 8 | could [verb] [vb pp] back to | 5 |
|
| 9 | could [verb] [vb pp] back to | 5 |
|
