| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] often [adv] possible [to-vb] | 7 |
|
| 2 | be often [adv] possible [to-vb] | 7 |
|
| 3 | is often [adv] possible [to-vb] | 6 |
|
| 4 | [is] often [adv] possible [to-vb] | 6 |
|
