| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] why it is that | 27 |
|
| 2 | [to-vb] why it is that | 12 |
|
| 3 | explain why it is that | 10 |
|
| 4 | [vb base] why it is that | 6 |
|
| 5 | [prep] why it is that | 5 |
|
| 6 | [prep] why it is that | 5 |
|
| 7 | [vb infin] why it is that | 5 |
|
| 8 | to explain why it is that | 5 |
|
| 9 | why it is [adj] that | 18 |
|
| 10 | why it is [adj] that | 18 |
|
| 11 | why it is important that | 8 |
|
| 12 | why it is important that | 8 |
|
| 13 | why it is essential that | 5 |
|
| 14 | why it is [vb pp] that | 5 |
|
| 15 | why it is essential that | 5 |
|
| 16 | why it is [verb] that | 5 |
|
| 17 | why it is that [art] | 18 |
|
| 18 | why it is that [art] | 18 |
|
| 19 | why it is that the | 13 |
|
| 20 | why it is that the | 13 |
|
| 21 | why it is that [pron] | 11 |
|
| 22 | why it is that [noun] | 9 |
|
| 23 | why it is that [pers pn] | 7 |
|
| 24 | why it is that [noun pl] | 5 |
|
