| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that is why [pron] [verb] | 251 |
|
| 2 | that is why [pers pn] [verb] | 248 |
|
| 3 | that be why it [verb] | 67 |
|
| 4 | that [be] why it [verb] | 67 |
|
| 5 | that [is] why it [verb] | 62 |
|
| 6 | that is [Wh adv] it [verb] | 36 |
|
| 7 | that is [adv] it [verb] | 36 |
|
| 8 | [adj] is why it [verb] | 22 |
|
| 9 | that is why it [verb] | 16 |
|
| 10 | that is why it [verb] | 16 |
|
