| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how do they | 356 |
|
| 2 | how [vb base] they | 211 |
|
| 3 | how do they | 201 |
|
| 4 | how [vb past] they | 176 |
|
| 5 | how did they | 155 |
|
| 6 | how have they | 21 |
|
| 7 | how [vb pp] they | 16 |
|
| 8 | how come they | 16 |
|
| 9 | how come they | 16 |
|
| 10 | how had they | 11 |
|
| 11 | how have they | 9 |
|
