| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] why they do it | 10 |
|
| 2 | know why they do it | 7 |
|
| 3 | [vb infin] why they do it | 7 |
|
| 4 | why [verb] they do it | 16 |
|
| 5 | why do they do it | 15 |
|
| 6 | why [vb base] they do it | 10 |
|
| 7 | why do they do it | 9 |
|
| 8 | why did they do it | 6 |
|
| 9 | why [vb past] they do it | 6 |
|
| 10 | why they be do it | 6 |
|
| 11 | why they [am/are] do it | 6 |
|
| 12 | why they [be] do it | 6 |
|
| 13 | why they [verb] do it | 5 |
|
| 14 | why they have do it | 5 |
|
| 15 | why they do it [conj] | 5 |
|
