| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is difficult [to-vb] [conj] [art] | 60 |
|
| 2 | is difficult [to-vb] [conj] [art] | 60 |
|
| 3 | is difficult [to-vb] [conj] the | 44 |
|
| 4 | is difficult [to-vb] [conj] the | 44 |
|
| 5 | is difficult [to-vb] [that] [art] | 36 |
|
| 6 | is difficult [to-vb] that [art] | 36 |
|
| 7 | is difficult [to-vb] that [art] | 36 |
|
| 8 | is difficult [to-vb] [subord] [art] | 23 |
|
| 9 | is difficult to believe [conj] [art] | 16 |
|
| 10 | is difficult [to-vb] whether [art] | 15 |
|
| 11 | is difficult [to-vb] whether [art] | 15 |
|
| 12 | is difficult [to-vb] [conj] a | 12 |
|
| 13 | is difficult [to-vb] [conj] a | 11 |
|
| 14 | is difficult to argue [conj] [art] | 6 |
|
