| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be back to | 102 |
|
| 2 | it [be] back to | 102 |
|
| 3 | it [is] back to | 64 |
|
| 4 | it 's back to | 52 |
|
| 5 | it [was/were] back to | 38 |
|
| 6 | it was back to | 38 |
|
| 7 | it is back to | 12 |
|
