| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [pers pn] [vb infin] on [verb] | 9 |
|
| 2 | why do [pers pn] [vb infin] on [v-ing] | 8 |
|
| 3 | why do [pers pn] [vb infin] on [verb] | 7 |
|
| 4 | why do [pers pn] go on [verb] | 5 |
|
