| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] behind | 34 |
|
| 2 | it be behind | 34 |
|
| 3 | it [is] behind | 21 |
|
| 4 | it 's behind | 16 |
|
| 5 | it [was/were] behind | 13 |
|
| 6 | it was behind | 12 |
|
| 7 | it is behind | 5 |
|
