| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an approach [modal v] [verb] | 30 |
|
| 2 | an approach that [verb] | 19 |
|
| 3 | approach that [modal v] [verb] | 12 |
|
| 4 | an approach that [modal v] | 9 |
|
