| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is difficult to distinguish | 7 |
|
| 2 | it is [adv] difficult to distinguish | 13 |
|
| 3 | it is [adv] difficult to distinguish | 12 |
|
| 4 | it is difficult to distinguish [prep] | 6 |
|
| 5 | it is difficult to distinguish [prep] | 6 |
|
| 6 | it is difficult to distinguish between | 5 |
|
| 7 | it is difficult to distinguish between | 5 |
|
| 8 | it is difficult to distinguish [adj] | 5 |
|
