| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when do [pers pn] [num ord] [vb infin] | 29 |
|
| 2 | when did [pron] [num ord] [vb infin] | 28 |
|
| 3 | when do you [num ord] [vb infin] | 27 |
|
| 4 | when do [pron] first [vb infin] | 27 |
|
| 5 | when do you [num ord] [vb infin] | 27 |
|
| 6 | when do [pron] [num ord] meet | 6 |
|
