| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be keeping a close watch on | 8 |
|
| 2 | [be] keeping a close watch on | 8 |
|
| 3 | [am/are] keeping a close watch on | 6 |
|
| 4 | are keeping a close watch on | 6 |
|
