| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | look [adv] [prep] a | 890 |
|
| 2 | back [adv] [prep] a | 133 |
|
| 3 | look back [adv] [prep] | 69 |
|
| 4 | look back [prep] a | 37 |
|
