| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is this [adv] | 288 |
|
| 2 | is [adj] why | 162 |
|
| 3 | is [det] why | 136 |
|
| 4 | is this [Wh adv] | 41 |
|
| 5 | [is] this why | 18 |
|
| 6 | [be] this why | 18 |
|
| 7 | be this why | 18 |
|
| 8 | is this why | 17 |
|
| 9 | is this why | 17 |
|
