| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] why it is | 123 |
|
| 2 | [be] why it is | 91 |
|
| 3 | be why it is | 91 |
|
| 4 | [is] why it is | 90 |
|
| 5 | is why it is | 81 |
|
| 6 | [noun] why it is | 43 |
|
| 7 | explain why it is | 37 |
|
| 8 | reason why it is | 37 |
|
| 9 | [to-vb] why it is | 34 |
|
| 10 | [vb base] why it is | 27 |
|
| 11 | [vb infin] why it is | 27 |
|
| 12 | [conj] why it is | 26 |
|
| 13 | [coord] why it is | 26 |
|
| 14 | and why it is | 23 |
|
| 15 | [noun sg] why it is | 23 |
|
| 16 | and why it is | 23 |
|
| 17 | reason why it is | 21 |
|
| 18 | [prep] why it is | 21 |
|
| 19 | [prep] why it is | 21 |
|
| 20 | [noun pl] why it is | 19 |
|
| 21 | understand why it is | 17 |
|
| 22 | know why it is | 16 |
|
| 23 | reasons why it is | 16 |
|
| 24 | [vb -s] why it is | 15 |
|
| 25 | [adv] why it is | 11 |
|
| 26 | of why it is | 11 |
|
| 27 | of why it is | 11 |
|
| 28 | to understand why it is | 11 |
|
| 29 | [vb pp] why it is | 11 |
|
| 30 | wonder why it is | 11 |
|
