| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] it is often [adj] [to-vb] | 26 |
|
| 2 | [noun] it is often [adj] [verb] | 26 |
|
| 3 | [noun sg] it is often [adj] [verb] | 18 |
|
| 4 | [noun] it is often possible [verb] | 7 |
|
| 5 | [noun pl] it is often [adj] [verb] | 7 |
|
| 6 | [noun] it is often difficult [verb] | 5 |
|
