| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 122 |
|
|
| 2 | but it be difficult [verb] | 122 |
|
| 3 | but it be difficult [to-vb] | 122 |
|
| 4 | but it is difficult [verb] | 76 |
|
| 5 | but it was difficult [verb] | 28 |
|
| 6 | but it be difficult see | 18 |
|
| 7 | but it be difficult to see | 18 |
|
| 8 | but it 's difficult [verb] | 18 |
|
| 9 | but it be difficult imagine | 8 |
|
| 10 | but it be difficult to imagine | 8 |
|
| 11 | but it be difficult to get | 5 |
|
| 12 | but it be difficult get | 5 |
|
| 13 | but it be difficult to find | 5 |
|
| 14 | but it be difficult to tell | 5 |
|
| 15 | but it be difficult tell | 5 |
|
| 16 | but it be difficult find | 5 |
|
