| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] also useful [verb] | 24 |
|
| 2 | it [is] also useful [to-vb] | 24 |
|
| 3 | it [is] also useful [verb] | 24 |
|
| 4 | it is also useful [verb] | 22 |
|
