| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is often [adv] [adj] [verb] | 35 |
|
| 2 | it is often [adv] [adj] [to-vb] | 35 |
|
| 3 | it is often [adv] [adj] [verb] | 35 |
|
| 4 | it is often [adv] [adj] [verb] | 27 |
|
| 5 | it is often [adv] difficult [verb] | 11 |
|
| 6 | it is often [not/n't] [adj] [verb] | 8 |
|
| 7 | it is often more [adj] [verb] | 8 |
|
| 8 | it is often not [adj] [verb] | 8 |
|
| 9 | it is often not [adj] [verb] | 8 |
|
| 10 | it is often very [adj] [verb] | 8 |
|
| 11 | it is often very [adj] [verb] | 8 |
|
| 12 | it is often more [adj] [verb] | 8 |
|
| 13 | it is often [adv] possible [verb] | 6 |
|
