| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | he [vb mod] keep an eye on | 8 |
|
| 2 | he [modal v] keep an eye on | 8 |
|
| 3 | he [be] keep an eye on | 5 |
|
| 4 | he be keep an eye on | 5 |
|
