| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [to-vb] [conj] | 381 |
|
| 2 | [adv] difficult [verb] [subord] | 196 |
|
| 3 | more difficult [verb] [conj] | 146 |
|
| 4 | [adv] difficult [verb] [coord] | 136 |
|
| 5 | [adv] difficult [verb] and | 109 |
|
| 6 | [adv] difficult [verb] and | 109 |
|
| 7 | [adv] difficult [verb] than | 66 |
|
| 8 | [adv] difficult [verb] than | 66 |
|
| 9 | very difficult [verb] [conj] | 65 |
|
| 10 | [adv] difficult [verb] that | 50 |
|
| 11 | [adv] difficult [verb] [that] | 50 |
|
| 12 | [adv] difficult [verb] that | 50 |
|
| 13 | [adv] difficult [verb] because | 38 |
|
| 14 | [adv] difficult [verb] because | 38 |
|
| 15 | [adv] difficult [verb] whether | 31 |
|
| 16 | [adv] difficult [verb] whether | 31 |
|
| 17 | extremely difficult [verb] [conj] | 21 |
|
| 18 | [adv] difficult [verb] when | 16 |
|
| 19 | [adv] difficult [verb] when | 16 |
|
| 20 | [adv] difficult [verb] or | 15 |
|
| 21 | so difficult [verb] [conj] | 15 |
|
| 22 | [adv] difficult [verb] as | 15 |
|
| 23 | [adv] difficult [verb] or | 15 |
|
| 24 | [adv] difficult [verb] as | 15 |
|
| 25 | [adv] difficult do [conj] | 14 |
|
| 26 | often difficult [verb] [conj] | 14 |
|
| 27 | [adv] difficult to do [conj] | 14 |
|
| 28 | [adv] difficult [verb] but | 12 |
|
| 29 | [adv] difficult achieve [conj] | 12 |
|
| 30 | [adv] difficult understand [conj] | 12 |
|
