| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back [prep] | 24756 |
|
| 2 | [vb base] back [prep] | 2703 |
|
| 3 | refer back [prep] | 169 |
|
| 4 | refer [adv] [prep] | 89 |
|
| 5 | refer [adv prt] [prep] | 21 |
|
| 6 | refer back [prep] | 20 |
|
