| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] and why do | 11 |
|
| 2 | how and why [verb] | 10 |
|
| 3 | how and [Wh adv] do | 8 |
|
| 4 | how and [adv] do | 8 |
|
| 5 | how [conj] why do | 5 |
|
| 6 | how and why do | 5 |
|
| 7 | how [coord] why do | 5 |
|
| 8 | how and why do | 5 |
|
