| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] do we use | 8 |
|
| 2 | [Wh adv] do we use | 7 |
|
| 3 | [Wh adv] [vb base] we use | 7 |
|
| 4 | why [verb] we use | 6 |
|
