| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] difficult [to-vb] [adj] | 80 |
|
| 2 | it is [adv] difficult [to-vb] [adj] | 40 |
|
| 3 | it is [adv] difficult [to-vb] [det] | 38 |
|
| 4 | it is very difficult [to-vb] [adj] | 25 |
|
| 5 | it is extremely difficult [to-vb] [adj] | 15 |
|
| 6 | it is [adv] difficult [to-vb] any | 11 |
|
| 7 | it is [adv] difficult [to-vb] any | 11 |
|
| 8 | it is often difficult [to-vb] [adj] | 10 |
|
| 9 | it is [adv] difficult [to-vb] this | 9 |
|
| 10 | it is [adv] difficult [to-vb] this | 9 |
|
| 11 | it is [adv] difficult to find [adj] | 8 |
|
| 12 | it is [adv] difficult to make [adj] | 7 |
|
| 13 | it is more difficult [to-vb] [adj] | 6 |
|
| 14 | it is [adv] difficult [to-vb] such | 5 |
|
| 15 | it is [adv] difficult [to-vb] such | 5 |
|
