| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] it difficult [to-vb] [adj] | 17 |
|
| 2 | makes it difficult [to-vb] [adj] | 10 |
|
| 3 | [vb -s] it difficult [to-vb] [det] | 9 |
|
| 4 | [vb -s] it difficult [to-vb] [adj] | 7 |
|
| 5 | finds it difficult [to-vb] [adj] | 7 |
|
