| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] improve [art] | 8 |
|
| 2 | [vb mod] help improve [art] | 8 |
|
| 3 | [vb mod] [verb] improve the | 8 |
|
| 4 | [vb mod] [verb] improve the | 8 |
|
| 5 | [vb mod] [verb] improve [art] | 8 |
|
| 6 | [vb mod] help improve [art] | 8 |
|
