| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] keep an eye | 25 |
|
| 2 | [vb base] [to-vb] an eye | 20 |
|
| 3 | [vb base] to keep an eye | 18 |
|
| 4 | have [verb] an eye | 9 |
|
