| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] keep up the | 19 |
|
| 2 | [modal v] keep up the | 19 |
|
| 3 | [vb mod] keep up the | 19 |
|
| 4 | [modal v] keep up the | 19 |
|
| 5 | can keep up the | 6 |
|
| 6 | can keep up the | 6 |
|
| 7 | must keep up the | 5 |
|
| 8 | will keep up the | 5 |
|
| 9 | must keep up the | 5 |
|
