| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [to-vb] [vb infin] | 180 |
|
| 2 | how [to-vb] [verb] | 115 |
|
| 3 | how [verb] [vb infin] | 42 |
|
| 4 | [Wh adv] [to-vb] [vb infin] | 15 |
|
| 5 | how [to-vb] [vb infin] | 13 |
|
