| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] [noun] [prep] | 224356 |
|
| 2 | keep a [adj] [noun] | 889 |
|
| 3 | keep a [noun] [prep] | 670 |
|
| 4 | keep [adj] [noun] [prep] | 319 |
|
