| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when do it [verb] | 42 |
|
| 2 | when do it [vb infin] | 41 |
|
| 3 | when did it [verb] | 26 |
|
| 4 | when does it [verb] | 16 |
|
| 5 | when do it happen | 15 |
|
| 6 | when do it happen | 15 |
|
| 7 | when do it start | 9 |
|
| 8 | when do it start | 9 |
|
