| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] keep up [art] | 14 |
|
| 2 | [vb base] to keep up [art] | 10 |
|
| 3 | [vb base] keep up a | 7 |
|
| 4 | [vb base] keep up the | 7 |
|
| 5 | [vb base] keep up the | 7 |
|
| 6 | [vb base] keep up a | 5 |
|
