| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i must [vb infin] back [prep] the | 9 |
|
| 2 | i must [vb infin] back to the | 8 |
|
| 3 | i must [vb infin] back to the | 8 |
|
| 4 | i must go back [prep] the | 5 |
|
