| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] keep a close eye on | 11 |
|
| 2 | [vb mod] keep [art] close eye on | 11 |
|
| 3 | [modal v] keep [art] close eye on | 11 |
|
| 4 | [modal v] keep [art] close eye on | 11 |
|
| 5 | [modal v] keep a close eye on | 10 |
|
