| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] have [adv] [been] back [prep] | 5 |
|
| 2 | [pron] have [adv] [been] back [prep] | 5 |
|
| 3 | have [adv] [been] [verb] back [prep] | 19 |
|
| 4 | have [adv] [been] [vb pp] back [prep] | 16 |
|
