| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | make it more difficult [prep] [adj] | 13 |
|
| 2 | [verb] it more difficult for [adj] | 13 |
|
| 3 | [verb] it more difficult [prep] [adj] | 13 |
|
| 4 | [verb] it more difficult [prep] [adj] | 9 |
|
