| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] sometimes hard [verb] | 10 |
|
| 2 | it [is] sometimes hard [to-vb] | 10 |
|
| 3 | it 's sometimes hard [verb] | 5 |
|
| 4 | it is sometimes hard [verb] | 5 |
|
