| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [modal v] contribute to the | 18 |
|
| 2 | which [vb mod] contribute [prep] the | 18 |
|
| 3 | which may contribute [prep] the | 5 |
|
| 4 | which will contribute [prep] the | 5 |
|
| 5 | which may contribute [prep] the | 5 |
|
| 6 | which will contribute [prep] the | 5 |
|
