| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] [verb] to | 2978 |
|
| 2 | [is] often [verb] to | 174 |
|
| 3 | [is] often [adv] [verb] | 105 |
|
| 4 | often [adv] [verb] to | 28 |
|
