| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] difficult [to-vb] [adv] [art] | 25 |
|
| 2 | [is] [adv] difficult [to-vb] [adv] [art] | 21 |
|
| 3 | [be] [adv] difficult [to-vb] [adv] the | 18 |
|
| 4 | is [adv] difficult [to-vb] [adv] [art] | 17 |
|
| 5 | [be] very difficult [to-vb] [adv] [art] | 13 |
|
| 6 | [be] [adv] difficult [to-vb] [Wh adv] [art] | 11 |
|
| 7 | [be] [adv] difficult [to-vb] [adv prt] [art] | 8 |
|
| 8 | [be] [adv] difficult [to-vb] [adv] [art] | 6 |
|
| 9 | [be] [adv] difficult [to-vb] how [art] | 5 |
|
| 10 | [be] [adv] difficult [to-vb] why [art] | 5 |
|
| 11 | [be] [adv] difficult [to-vb] [adv] a | 5 |
|
| 12 | [be] [adv] difficult [to-vb] why [art] | 5 |
|
| 13 | [be] [adv] difficult [to-vb] how [art] | 5 |
|
