| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an [noun sg] [prep] [adj] | 12161 |
|
| 2 | keep an [noun sg] [prep] | 510 |
|
| 3 | keep [noun sg] [prep] [adj] | 137 |
|
| 4 | keep an [noun sg] [adj] | 34 |
|
