| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] sometimes hard [to-vb] | 15 |
|
| 2 | it be sometimes hard [verb] | 15 |
|
| 3 | it [is] sometimes hard [verb] | 10 |
|
| 4 | it 's sometimes hard [verb] | 5 |
|
| 5 | it is sometimes hard [verb] | 5 |
|
| 6 | it was sometimes hard [verb] | 5 |
|
| 7 | it [was/were] sometimes hard [verb] | 5 |
|
