| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] sometimes [adj] [to-vb] | 99 |
|
| 2 | it is sometimes [adj] [verb] | 89 |
|
| 3 | it [is] sometimes difficult [verb] | 24 |
|
| 4 | it [is] sometimes possible [verb] | 21 |
|
| 5 | it [is] sometimes useful [verb] | 14 |
|
| 6 | it 's sometimes [adj] [verb] | 11 |
|
| 7 | it [is] sometimes necessary [verb] | 10 |
|
| 8 | it [is] sometimes hard [verb] | 10 |
|
