| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could keep an eye on [pron] | 10 |
|
| 2 | could [vb infin] an eye on [pron] | 10 |
|
| 3 | could keep an eye on [pron] | 10 |
|
| 4 | could [verb] an eye on [pron] | 10 |
|
| 5 | could [verb] an eye on [pers pn] | 7 |
|
