| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] difficult [to-vb] [adv] the [adj] | 22 |
|
| 2 | be difficult [to-vb] [adv] the [adj] | 22 |
|
| 3 | [be] difficult [to-vb] [adv] the [adj] | 20 |
|
| 4 | [is] difficult [to-vb] [adv] the [adj] | 18 |
|
| 5 | is difficult [to-vb] [adv] the [adj] | 15 |
|
| 6 | [be] difficult [to-vb] [Wh adv] the [adj] | 12 |
|
| 7 | [be] difficult [to-vb] how the [adj] | 10 |
|
| 8 | [be] difficult [to-vb] how the [adj] | 10 |
|
| 9 | [be] difficult to see [adv] the [adj] | 7 |
|
| 10 | [be] difficult [to-vb] [adv] the [adj] | 5 |
|
| 11 | [be] difficult [to-vb] [adv prt] the [adj] | 5 |
|
