| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] back [prep] the [noun] | 37 |
|
| 2 | must [vb infin] back [prep] the [noun] | 37 |
|
| 3 | must [vb infin] back to the [noun] | 31 |
|
| 4 | must [vb infin] back [prep] the [noun sg] | 29 |
|
| 5 | must go back [prep] the [noun] | 15 |
|
| 6 | must get back [prep] the [noun] | 11 |
|
| 7 | must [vb infin] back [prep] the [noun pl] | 6 |
|
