| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] [vb pp] [to-vb] | 7881 |
|
| 2 | be [adv] [vb pp] aback | 65 |
|
| 3 | [adv] [vb pp] aback [to-vb] | 10 |
|
| 4 | be [vb pp] aback [to-vb] | 6 |
|
