| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do we [vb infin] | 167 |
|
| 2 | why do we need | 31 |
|
| 3 | why do we have | 28 |
|
| 4 | why do we do | 13 |
|
| 5 | why do we use | 6 |
|
| 6 | why do we want | 6 |
|
| 7 | why do we get | 5 |
|
