| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [pron] back [prep] the | 155 |
|
| 2 | must [vb infin] [pron] [prep] the | 107 |
|
| 3 | must [vb infin] back [prep] the | 43 |
|
| 4 | must [vb infin] [pron] back [prep] | 12 |
|
