| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an [noun] [prep] [adj] | 12228 |
|
| 2 | keep an [noun] [prep] | 89 |
|
| 3 | keep [noun] [prep] [adj] | 37 |
|
| 4 | keep an [noun] [adj] | 10 |
|
