| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why is it [adj] | 103 |
|
| 2 | why is it [adj] | 62 |
|
| 3 | why is it [det] | 32 |
|
| 4 | why is it that | 24 |
|
| 5 | why is it that | 24 |
|
| 6 | why is it important | 14 |
|
| 7 | why is it necessary | 14 |
|
| 8 | why is it necessary | 14 |
|
| 9 | why is it important | 14 |
|
| 10 | why is it [adj -er] | 6 |
|
