| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] [vb pp] [prep] | 3484 |
|
| 2 | be [adv] [vb pp] back [prep] | 185 |
|
| 3 | it be [vb pp] back [prep] | 31 |
|
| 4 | it be [adv] [vb pp] back | 13 |
|
| 5 | it be [adv] back [prep] | 10 |
|
