| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what do [vb infin] to | 16 |
|
| 2 | what [vb past] [vb infin] to | 9 |
|
| 3 | what did [vb infin] to | 9 |
|
| 4 | what [verb] happen to | 7 |
|
| 5 | what does [vb infin] to | 7 |
|
| 6 | what [vb -s] [vb infin] to | 7 |
|
