| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] a close eye on [pron] | 7 |
|
| 2 | [to-vb] a close eye on [pron] | 7 |
|
| 3 | [to-vb] a close eye [prep] [pron] | 7 |
|
| 4 | to keep a close eye [prep] [pron] | 7 |
|
| 5 | [to-vb] a close eye [prep] [pos pn] | 5 |
|
