| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] keep a close eye on | 7 |
|
| 2 | be [verb] a close eye on | 7 |
|
| 3 | [be] [v-ing] a close eye on | 7 |
|
| 4 | [be] keeping a close eye on | 7 |
|
