| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] [pron] [modal v] | 863 |
|
| 2 | [is] [Wh adv] [pron] [modal v] | 652 |
|
| 3 | [be] why [pron] [modal v] | 251 |
|
| 4 | [is] why [pron] [modal v] | 242 |
|
