| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] difficult [to-vb] [prep] the | 66 |
|
| 2 | be [adv] difficult [verb] [prep] the | 66 |
|
| 3 | be [adv] difficult [verb] [prep] the | 64 |
|
| 4 | is [adv] difficult [verb] [prep] the | 30 |
|
| 5 | be very difficult [verb] [prep] the | 20 |
|
| 6 | be very difficult [verb] [prep] the | 20 |
|
| 7 | are [adv] difficult [verb] [prep] the | 12 |
|
| 8 | be [adv] difficult [verb] [prep] the | 11 |
|
| 9 | be [adv] difficult [verb] in the | 11 |
|
| 10 | be more difficult [verb] [prep] the | 10 |
|
| 11 | be more difficult [verb] [prep] the | 10 |
|
| 12 | be [adv] difficult [verb] to the | 8 |
|
| 13 | be [adv] difficult [verb] from the | 8 |
|
| 14 | was [adv] difficult [verb] [prep] the | 7 |
|
| 15 | be often difficult [verb] [prep] the | 7 |
|
| 16 | be often difficult [verb] [prep] the | 7 |
|
| 17 | be [adv] difficult distinguish [prep] the | 6 |
|
| 18 | be [adv] difficult to distinguish [prep] the | 6 |
|
| 19 | be extremely difficult [verb] [prep] the | 6 |
|
| 20 | be extremely difficult [verb] [prep] the | 6 |
|
| 21 | be [adv] difficult [verb] between the | 5 |
|
| 22 | be [adv] difficult [verb] into the | 5 |
|
