| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] why you should [vb infin] | 27 |
|
| 2 | know why [pron] should [vb infin] | 21 |
|
| 3 | know [adv] you should [vb infin] | 10 |
|
| 4 | know why you [modal v] [vb infin] | 10 |
|
| 5 | know [Wh adv] you should [vb infin] | 10 |
|
| 6 | know why you should [verb] | 8 |
|
| 7 | know why you should [vb infin] | 8 |
|
