| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is often [adj] [verb] [adj] | 33 |
|
| 2 | it is often [adj] [verb] [adj] | 32 |
|
| 3 | it is often possible [verb] [adj] | 11 |
|
| 4 | it is often possible [verb] [adj] | 11 |
|
| 5 | it is often difficult [verb] [adj] | 10 |
|
| 6 | it is often difficult [verb] [adj] | 10 |
|
| 7 | it is often [verb] [conj] [adj] | 29 |
|
| 8 | it is often [verb] that [adj] | 26 |
|
| 9 | it is often [verb] [that] [adj] | 26 |
|
| 10 | it is often [verb] that [adj] | 26 |
|
| 11 | it is often [verb] [prep] [adj] | 15 |
|
| 12 | it is often [verb] [prep] [adj] | 15 |
|
