| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [vb pp] in | 950 |
|
| 2 | [modal v] [verb] [vb pp] back | 113 |
|
| 3 | [modal v] [verb] back in | 107 |
|
| 4 | [verb] [vb pp] back in | 57 |
|
