| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | reason [Wh adv] i [vb mod] [verb] | 13 |
|
| 2 | reason [Wh adv] i [vb mod] [vb infin] | 13 |
|
| 3 | reason why i [vb mod] [verb] | 13 |
|
| 4 | reason [Wh adv] i should [verb] | 11 |
|
