| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] keep a close watch [prep] | 5 |
|
| 2 | [noun pl] keep a close watch [prep] | 5 |
|
| 3 | [noun pl] keep a close watch on | 5 |
|
| 4 | [noun pl] keep a close watch on | 5 |
|
