| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been behind | 46 |
|
| 2 | had [been] behind | 16 |
|
| 3 | have [been] behind | 10 |
|
| 4 | has [been] behind | 8 |
|
| 5 | to have [been] behind | 6 |
|
