| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] back [prep] the [noun] | 20 |
|
| 2 | should [vb infin] back [prep] the [noun sg] | 17 |
|
| 3 | should [vb infin] back to the [noun] | 16 |
|
| 4 | should go back [prep] the [noun] | 13 |
|
