| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [noun] did [pron] | 288 |
|
| 2 | what year [vb past] [pron] | 8 |
|
| 3 | what year did [pron] | 8 |
|
| 4 | what year do [pron] | 8 |
|
| 5 | [pron] year did [pron] | 8 |
|
| 6 | [Wh det] year did [pron] | 8 |
|
| 7 | what year [verb] [pron] | 8 |
|
