| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] keep a close eye | 10 |
|
| 2 | [vb mod] keep a close eye | 10 |
|
| 3 | keep a close eye [prep] | 12 |
|
| 4 | keep a close eye [prep] | 12 |
|
| 5 | keep a close eye on | 12 |
|
| 6 | keep a close eye on | 12 |
|
