| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [coord] it is often [verb] | 6 |
|
| 2 | [coord] it is often [adj] [verb] | 25 |
|
| 3 | [coord] it is often [adj] [verb] | 21 |
|
| 4 | [coord] it is often difficult [verb] | 9 |
|
| 5 | [coord] it is often difficult [verb] | 9 |
|
| 6 | [coord] it is often [verb] that | 8 |
|
| 7 | [coord] it is often [verb] [that] | 8 |
|
| 8 | [coord] it is often [verb] that | 8 |
|
| 9 | [coord] it is often [verb] [prep] | 8 |
|
| 10 | [coord] it is often [verb] [prep] | 8 |
|
| 11 | [coord] it is often [verb] [conj] | 8 |
|
| 12 | [coord] it is often [verb] [adv] | 5 |
|
