| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how did i [vb infin] [prep] | 10 |
|
| 2 | how [vb past] i [vb infin] [prep] | 10 |
|
| 3 | how [vb past] i [vb infin] [prep] | 10 |
|
