| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and it be difficult [to-vb] | 127 |
|
| 2 | and it be difficult [to-vb] | 127 |
|
| 3 | and it is difficult [to-vb] | 84 |
|
| 4 | and it was difficult [to-vb] | 29 |
|
| 5 | and it be difficult to see | 27 |
|
| 6 | and it 's difficult [to-vb] | 14 |
|
| 7 | and it be difficult to believe | 7 |
|
| 8 | and it be difficult to know | 6 |
|
| 9 | and it be difficult to decide | 5 |
|
